diff options
Diffstat (limited to 'arch/m68k/atari')
| -rw-r--r-- | arch/m68k/atari/Makefile | 11 | ||||
| -rw-r--r-- | arch/m68k/atari/ataints.c | 391 | ||||
| -rw-r--r-- | arch/m68k/atari/atakeyb.c | 570 | ||||
| -rw-r--r-- | arch/m68k/atari/atasound.c | 109 | ||||
| -rw-r--r-- | arch/m68k/atari/config.c | 937 | ||||
| -rw-r--r-- | arch/m68k/atari/debug.c | 329 | ||||
| -rw-r--r-- | arch/m68k/atari/nvram.c | 272 | ||||
| -rw-r--r-- | arch/m68k/atari/stdma.c | 219 | ||||
| -rw-r--r-- | arch/m68k/atari/stram.c | 202 | ||||
| -rw-r--r-- | arch/m68k/atari/time.c | 319 |
10 files changed, 3359 insertions, 0 deletions
diff --git a/arch/m68k/atari/Makefile b/arch/m68k/atari/Makefile new file mode 100644 index 000000000..2e3607f97 --- /dev/null +++ b/arch/m68k/atari/Makefile @@ -0,0 +1,11 @@ +# SPDX-License-Identifier: GPL-2.0-only +# +# Makefile for Linux arch/m68k/atari source directory +# + +obj-y := config.o time.o debug.o ataints.o stdma.o \ + atasound.o stram.o + +obj-$(CONFIG_ATARI_KBD_CORE) += atakeyb.o + +obj-$(CONFIG_NVRAM:m=y) += nvram.o diff --git a/arch/m68k/atari/ataints.c b/arch/m68k/atari/ataints.c new file mode 100644 index 000000000..56f02ea2c --- /dev/null +++ b/arch/m68k/atari/ataints.c @@ -0,0 +1,391 @@ +/* + * arch/m68k/atari/ataints.c -- Atari Linux interrupt handling code + * + * 5/2/94 Roman Hodek: + * Added support for TT interrupts; setup for TT SCU (may someone has + * twiddled there and we won't get the right interrupts :-() + * + * Major change: The device-independent code in m68k/ints.c didn't know + * about non-autovec ints yet. It hardcoded the number of possible ints to + * 7 (IRQ1...IRQ7). But the Atari has lots of non-autovec ints! I made the + * number of possible ints a constant defined in interrupt.h, which is + * 47 for the Atari. So we can call request_irq() for all Atari interrupts + * just the normal way. Additionally, all vectors >= 48 are initialized to + * call trap() instead of inthandler(). This must be changed here, too. + * + * 1995-07-16 Lars Brinkhoff <f93labr@dd.chalmers.se>: + * Corrected a bug in atari_add_isr() which rejected all SCC + * interrupt sources if there were no TT MFP! + * + * 12/13/95: New interface functions atari_level_triggered_int() and + * atari_register_vme_int() as support for level triggered VME interrupts. + * + * 02/12/96: (Roman) + * Total rewrite of Atari interrupt handling, for new scheme see comments + * below. + * + * 1996-09-03 lars brinkhoff <f93labr@dd.chalmers.se>: + * Added new function atari_unregister_vme_int(), and + * modified atari_register_vme_int() as well as IS_VALID_INTNO() + * to work with it. + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file COPYING in the main directory of this archive + * for more details. + * + */ + +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/kernel_stat.h> +#include <linux/init.h> +#include <linux/seq_file.h> +#include <linux/module.h> +#include <linux/irq.h> + +#include <asm/traps.h> + +#include <asm/atarihw.h> +#include <asm/atariints.h> +#include <asm/atari_stdma.h> +#include <asm/irq.h> +#include <asm/entry.h> +#include <asm/io.h> + + +/* + * Atari interrupt handling scheme: + * -------------------------------- + * + * All interrupt source have an internal number (defined in + * <asm/atariints.h>): Autovector interrupts are 1..7, then follow ST-MFP, + * TT-MFP, SCC, and finally VME interrupts. Vector numbers for the latter can + * be allocated by atari_register_vme_int(). + */ + +/* + * Bitmap for free interrupt vector numbers + * (new vectors starting from 0x70 can be allocated by + * atari_register_vme_int()) + */ +static int free_vme_vec_bitmap; + +/* GK: + * HBL IRQ handler for Falcon. Nobody needs it :-) + * ++andreas: raise ipl to disable further HBLANK interrupts. + */ +asmlinkage void falcon_hblhandler(void); +asm(".text\n" +__ALIGN_STR "\n\t" +"falcon_hblhandler:\n\t" + "orw #0x200,%sp@\n\t" /* set saved ipl to 2 */ + "rte"); + +extern void atari_microwire_cmd(int cmd); + +static unsigned int atari_irq_startup(struct irq_data *data) +{ + unsigned int irq = data->irq; + + m68k_irq_startup(data); + atari_turnon_irq(irq); + atari_enable_irq(irq); + return 0; +} + +static void atari_irq_shutdown(struct irq_data *data) +{ + unsigned int irq = data->irq; + + atari_disable_irq(irq); + atari_turnoff_irq(irq); + m68k_irq_shutdown(data); + + if (irq == IRQ_AUTO_4) + vectors[VEC_INT4] = falcon_hblhandler; +} + +static void atari_irq_enable(struct irq_data *data) +{ + atari_enable_irq(data->irq); +} + +static void atari_irq_disable(struct irq_data *data) +{ + atari_disable_irq(data->irq); +} + +static struct irq_chip atari_irq_chip = { + .name = "atari", + .irq_startup = atari_irq_startup, + .irq_shutdown = atari_irq_shutdown, + .irq_enable = atari_irq_enable, + .irq_disable = atari_irq_disable, +}; + +/* + * ST-MFP timer D chained interrupts - each driver gets its own timer + * interrupt instance. + */ + +struct mfptimerbase { + volatile struct MFP *mfp; + unsigned char mfp_mask, mfp_data; + unsigned short int_mask; + int handler_irq, mfptimer_irq, server_irq; + char *name; +} stmfp_base = { + .mfp = &st_mfp, + .int_mask = 0x0, + .handler_irq = IRQ_MFP_TIMD, + .mfptimer_irq = IRQ_MFP_TIMER1, + .name = "MFP Timer D" +}; + +static irqreturn_t mfp_timer_d_handler(int irq, void *dev_id) +{ + struct mfptimerbase *base = dev_id; + int mach_irq; + unsigned char ints; + + mach_irq = base->mfptimer_irq; + ints = base->int_mask; + for (; ints; mach_irq++, ints >>= 1) { + if (ints & 1) + generic_handle_irq(mach_irq); + } + return IRQ_HANDLED; +} + + +static void atari_mfptimer_enable(struct irq_data *data) +{ + int mfp_num = data->irq - IRQ_MFP_TIMER1; + stmfp_base.int_mask |= 1 << mfp_num; + atari_enable_irq(IRQ_MFP_TIMD); +} + +static void atari_mfptimer_disable(struct irq_data *data) +{ + int mfp_num = data->irq - IRQ_MFP_TIMER1; + stmfp_base.int_mask &= ~(1 << mfp_num); + if (!stmfp_base.int_mask) + atari_disable_irq(IRQ_MFP_TIMD); +} + +static struct irq_chip atari_mfptimer_chip = { + .name = "timer_d", + .irq_enable = atari_mfptimer_enable, + .irq_disable = atari_mfptimer_disable, +}; + + +/* + * EtherNAT CPLD interrupt handling + * CPLD interrupt register is at phys. 0x80000023 + * Need this mapped in at interrupt startup time + * Possibly need this mapped on demand anyway - + * EtherNAT USB driver needs to disable IRQ before + * startup! + */ + +static unsigned char *enat_cpld; + +static unsigned int atari_ethernat_startup(struct irq_data *data) +{ + int enat_num = 140 - data->irq + 1; + + m68k_irq_startup(data); + /* + * map CPLD interrupt register + */ + if (!enat_cpld) + enat_cpld = (unsigned char *)ioremap((ATARI_ETHERNAT_PHYS_ADDR+0x23), 0x2); + /* + * do _not_ enable the USB chip interrupt here - causes interrupt storm + * and triggers dead interrupt watchdog + * Need to reset the USB chip to a sane state in early startup before + * removing this hack + */ + if (enat_num == 1) + *enat_cpld |= 1 << enat_num; + + return 0; +} + +static void atari_ethernat_enable(struct irq_data *data) +{ + int enat_num = 140 - data->irq + 1; + /* + * map CPLD interrupt register + */ + if (!enat_cpld) + enat_cpld = (unsigned char *)ioremap((ATARI_ETHERNAT_PHYS_ADDR+0x23), 0x2); + *enat_cpld |= 1 << enat_num; +} + +static void atari_ethernat_disable(struct irq_data *data) +{ + int enat_num = 140 - data->irq + 1; + /* + * map CPLD interrupt register + */ + if (!enat_cpld) + enat_cpld = (unsigned char *)ioremap((ATARI_ETHERNAT_PHYS_ADDR+0x23), 0x2); + *enat_cpld &= ~(1 << enat_num); +} + +static void atari_ethernat_shutdown(struct irq_data *data) +{ + int enat_num = 140 - data->irq + 1; + if (enat_cpld) { + *enat_cpld &= ~(1 << enat_num); + iounmap(enat_cpld); + enat_cpld = NULL; + } +} + +static struct irq_chip atari_ethernat_chip = { + .name = "ethernat", + .irq_startup = atari_ethernat_startup, + .irq_shutdown = atari_ethernat_shutdown, + .irq_enable = atari_ethernat_enable, + .irq_disable = atari_ethernat_disable, +}; + +/* + * void atari_init_IRQ (void) + * + * Parameters: None + * + * Returns: Nothing + * + * This function should be called during kernel startup to initialize + * the atari IRQ handling routines. + */ + +void __init atari_init_IRQ(void) +{ + m68k_setup_user_interrupt(VEC_USER, NUM_ATARI_SOURCES - IRQ_USER); + m68k_setup_irq_controller(&atari_irq_chip, handle_simple_irq, 1, + NUM_ATARI_SOURCES - 1); + + /* Initialize the MFP(s) */ + +#ifdef ATARI_USE_SOFTWARE_EOI + st_mfp.vec_adr = 0x48; /* Software EOI-Mode */ +#else + st_mfp.vec_adr = 0x40; /* Automatic EOI-Mode */ +#endif + st_mfp.int_en_a = 0x00; /* turn off MFP-Ints */ + st_mfp.int_en_b = 0x00; + st_mfp.int_mk_a = 0xff; /* no Masking */ + st_mfp.int_mk_b = 0xff; + + if (ATARIHW_PRESENT(TT_MFP)) { +#ifdef ATARI_USE_SOFTWARE_EOI + tt_mfp.vec_adr = 0x58; /* Software EOI-Mode */ +#else + tt_mfp.vec_adr = 0x50; /* Automatic EOI-Mode */ +#endif + tt_mfp.int_en_a = 0x00; /* turn off MFP-Ints */ + tt_mfp.int_en_b = 0x00; + tt_mfp.int_mk_a = 0xff; /* no Masking */ + tt_mfp.int_mk_b = 0xff; + } + + if (ATARIHW_PRESENT(SCC) && !atari_SCC_reset_done) { + atari_scc.cha_a_ctrl = 9; + MFPDELAY(); + atari_scc.cha_a_ctrl = (char) 0xc0; /* hardware reset */ + } + + if (ATARIHW_PRESENT(SCU)) { + /* init the SCU if present */ + tt_scu.sys_mask = 0x10; /* enable VBL (for the cursor) and + * disable HSYNC interrupts (who + * needs them?) MFP and SCC are + * enabled in VME mask + */ + tt_scu.vme_mask = 0x60; /* enable MFP and SCC ints */ + } else { + /* If no SCU and no Hades, the HSYNC interrupt needs to be + * disabled this way. (Else _inthandler in kernel/sys_call.S + * gets overruns) + */ + + vectors[VEC_INT2] = falcon_hblhandler; + vectors[VEC_INT4] = falcon_hblhandler; + } + + if (ATARIHW_PRESENT(PCM_8BIT) && ATARIHW_PRESENT(MICROWIRE)) { + /* Initialize the LM1992 Sound Controller to enable + the PSG sound. This is misplaced here, it should + be in an atasound_init(), that doesn't exist yet. */ + atari_microwire_cmd(MW_LM1992_PSG_HIGH); + } + + stdma_init(); + + /* Initialize the PSG: all sounds off, both ports output */ + sound_ym.rd_data_reg_sel = 7; + sound_ym.wd_data = 0xff; + + m68k_setup_irq_controller(&atari_mfptimer_chip, handle_simple_irq, + IRQ_MFP_TIMER1, 8); + + irq_set_status_flags(IRQ_MFP_TIMER1, IRQ_IS_POLLED); + irq_set_status_flags(IRQ_MFP_TIMER2, IRQ_IS_POLLED); + + /* prepare timer D data for use as poll interrupt */ + /* set Timer D data Register - needs to be > 0 */ + st_mfp.tim_dt_d = 254; /* < 100 Hz */ + /* start timer D, div = 1:100 */ + st_mfp.tim_ct_cd = (st_mfp.tim_ct_cd & 0xf0) | 0x6; + + /* request timer D dispatch handler */ + if (request_irq(IRQ_MFP_TIMD, mfp_timer_d_handler, IRQF_SHARED, + stmfp_base.name, &stmfp_base)) + pr_err("Couldn't register %s interrupt\n", stmfp_base.name); + + /* + * EtherNAT ethernet / USB interrupt handlers + */ + + m68k_setup_irq_controller(&atari_ethernat_chip, handle_simple_irq, + 139, 2); +} + + +/* + * atari_register_vme_int() returns the number of a free interrupt vector for + * hardware with a programmable int vector (probably a VME board). + */ + +unsigned int atari_register_vme_int(void) +{ + int i; + + for (i = 0; i < 32; i++) + if ((free_vme_vec_bitmap & (1 << i)) == 0) + break; + + if (i == 16) + return 0; + + free_vme_vec_bitmap |= 1 << i; + return VME_SOURCE_BASE + i; +} +EXPORT_SYMBOL(atari_register_vme_int); + + +void atari_unregister_vme_int(unsigned int irq) +{ + if (irq >= VME_SOURCE_BASE && irq < VME_SOURCE_BASE + VME_MAX_SOURCES) { + irq -= VME_SOURCE_BASE; + free_vme_vec_bitmap &= ~(1 << irq); + } +} +EXPORT_SYMBOL(atari_unregister_vme_int); + + diff --git a/arch/m68k/atari/atakeyb.c b/arch/m68k/atari/atakeyb.c new file mode 100644 index 000000000..5e0e682f9 --- /dev/null +++ b/arch/m68k/atari/atakeyb.c @@ -0,0 +1,570 @@ +/* + * Atari Keyboard driver for 680x0 Linux + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file COPYING in the main directory of this archive + * for more details. + */ + +/* + * Atari support by Robert de Vries + * enhanced by Bjoern Brauel and Roman Hodek + * + * 2.6 and input cleanup (removed autorepeat stuff) for 2.6.21 + * 06/07 Michael Schmitz + */ + +#include <linux/module.h> +#include <linux/sched.h> +#include <linux/kernel.h> +#include <linux/interrupt.h> +#include <linux/errno.h> +#include <linux/keyboard.h> +#include <linux/delay.h> +#include <linux/timer.h> +#include <linux/kd.h> +#include <linux/random.h> +#include <linux/init.h> +#include <linux/kbd_kern.h> + +#include <asm/atariints.h> +#include <asm/atarihw.h> +#include <asm/atarikb.h> +#include <asm/atari_joystick.h> +#include <asm/irq.h> + + +/* Hook for MIDI serial driver */ +void (*atari_MIDI_interrupt_hook) (void); +/* Hook for keyboard inputdev driver */ +void (*atari_input_keyboard_interrupt_hook) (unsigned char, char); +/* Hook for mouse inputdev driver */ +void (*atari_input_mouse_interrupt_hook) (char *); +EXPORT_SYMBOL(atari_input_keyboard_interrupt_hook); +EXPORT_SYMBOL(atari_input_mouse_interrupt_hook); + +/* variables for IKBD self test: */ + +/* state: 0: off; >0: in progress; >1: 0xf1 received */ +static volatile int ikbd_self_test; +/* timestamp when last received a char */ +static volatile unsigned long self_test_last_rcv; +/* bitmap of keys reported as broken */ +static unsigned long broken_keys[128/(sizeof(unsigned long)*8)] = { 0, }; + +#define BREAK_MASK (0x80) + +/* + * ++roman: The following changes were applied manually: + * + * - The Alt (= Meta) key works in combination with Shift and + * Control, e.g. Alt+Shift+a sends Meta-A (0xc1), Alt+Control+A sends + * Meta-Ctrl-A (0x81) ... + * + * - The parentheses on the keypad send '(' and ')' with all + * modifiers (as would do e.g. keypad '+'), but they cannot be used as + * application keys (i.e. sending Esc O c). + * + * - HELP and UNDO are mapped to be F21 and F24, resp, that send the + * codes "\E[M" and "\E[P". (This is better than the old mapping to + * F11 and F12, because these codes are on Shift+F1/2 anyway.) This + * way, applications that allow their own keyboard mappings + * (e.g. tcsh, X Windows) can be configured to use them in the way + * the label suggests (providing help or undoing). + * + * - Console switching is done with Alt+Fx (consoles 1..10) and + * Shift+Alt+Fx (consoles 11..20). + * + * - The misc. special function implemented in the kernel are mapped + * to the following key combinations: + * + * ClrHome -> Home/Find + * Shift + ClrHome -> End/Select + * Shift + Up -> Page Up + * Shift + Down -> Page Down + * Alt + Help -> show system status + * Shift + Help -> show memory info + * Ctrl + Help -> show registers + * Ctrl + Alt + Del -> Reboot + * Alt + Undo -> switch to last console + * Shift + Undo -> send interrupt + * Alt + Insert -> stop/start output (same as ^S/^Q) + * Alt + Up -> Scroll back console (if implemented) + * Alt + Down -> Scroll forward console (if implemented) + * Alt + CapsLock -> NumLock + * + * ++Andreas: + * + * - Help mapped to K_HELP + * - Undo mapped to K_UNDO (= K_F246) + * - Keypad Left/Right Parenthesis mapped to new K_PPAREN[LR] + */ + +typedef enum kb_state_t { + KEYBOARD, AMOUSE, RMOUSE, JOYSTICK, CLOCK, RESYNC +} KB_STATE_T; + +#define IS_SYNC_CODE(sc) ((sc) >= 0x04 && (sc) <= 0xfb) + +typedef struct keyboard_state { + unsigned char buf[6]; + int len; + KB_STATE_T state; +} KEYBOARD_STATE; + +KEYBOARD_STATE kb_state; + +/* ++roman: If a keyboard overrun happened, we can't tell in general how much + * bytes have been lost and in which state of the packet structure we are now. + * This usually causes keyboards bytes to be interpreted as mouse movements + * and vice versa, which is very annoying. It seems better to throw away some + * bytes (that are usually mouse bytes) than to misinterpret them. Therefore I + * introduced the RESYNC state for IKBD data. In this state, the bytes up to + * one that really looks like a key event (0x04..0xf2) or the start of a mouse + * packet (0xf8..0xfb) are thrown away, but at most 2 bytes. This at least + * speeds up the resynchronization of the event structure, even if maybe a + * mouse movement is lost. However, nothing is perfect. For bytes 0x01..0x03, + * it's really hard to decide whether they're mouse or keyboard bytes. Since + * overruns usually occur when moving the Atari mouse rapidly, they're seen as + * mouse bytes here. If this is wrong, only a make code of the keyboard gets + * lost, which isn't too bad. Losing a break code would be disastrous, + * because then the keyboard repeat strikes... + */ + +static irqreturn_t atari_keyboard_interrupt(int irq, void *dummy) +{ + u_char acia_stat; + int scancode; + int break_flag; + +repeat: + if (acia.mid_ctrl & ACIA_IRQ) + if (atari_MIDI_interrupt_hook) + atari_MIDI_interrupt_hook(); + acia_stat = acia.key_ctrl; + /* check out if the interrupt came from this ACIA */ + if (!((acia_stat | acia.mid_ctrl) & ACIA_IRQ)) + return IRQ_HANDLED; + + if (acia_stat & ACIA_OVRN) { + /* a very fast typist or a slow system, give a warning */ + /* ...happens often if interrupts were disabled for too long */ + pr_debug("Keyboard overrun\n"); + scancode = acia.key_data; + if (ikbd_self_test) + /* During self test, don't do resyncing, just process the code */ + goto interpret_scancode; + else if (IS_SYNC_CODE(scancode)) { + /* This code seem already to be the start of a new packet or a + * single scancode */ + kb_state.state = KEYBOARD; + goto interpret_scancode; + } else { + /* Go to RESYNC state and skip this byte */ + kb_state.state = RESYNC; + kb_state.len = 1; /* skip max. 1 another byte */ + goto repeat; + } + } + + if (acia_stat & ACIA_RDRF) { + /* received a character */ + scancode = acia.key_data; /* get it or reset the ACIA, I'll get it! */ + interpret_scancode: + switch (kb_state.state) { + case KEYBOARD: + switch (scancode) { + case 0xF7: + kb_state.state = AMOUSE; + kb_state.len = 0; + break; + + case 0xF8: + case 0xF9: + case 0xFA: + case 0xFB: + kb_state.state = RMOUSE; + kb_state.len = 1; + kb_state.buf[0] = scancode; + break; + + case 0xFC: + kb_state.state = CLOCK; + kb_state.len = 0; + break; + + case 0xFE: + case 0xFF: + kb_state.state = JOYSTICK; + kb_state.len = 1; + kb_state.buf[0] = scancode; + break; + + case 0xF1: + /* during self-test, note that 0xf1 received */ + if (ikbd_self_test) { + ++ikbd_self_test; + self_test_last_rcv = jiffies; + break; + } + fallthrough; + + default: + break_flag = scancode & BREAK_MASK; + scancode &= ~BREAK_MASK; + if (ikbd_self_test) { + /* Scancodes sent during the self-test stand for broken + * keys (keys being down). The code *should* be a break + * code, but nevertheless some AT keyboard interfaces send + * make codes instead. Therefore, simply ignore + * break_flag... + */ + int keyval, keytyp; + + set_bit(scancode, broken_keys); + self_test_last_rcv = jiffies; + /* new Linux scancodes; approx. */ + keyval = scancode; + keytyp = KTYP(keyval) - 0xf0; + keyval = KVAL(keyval); + + pr_warn("Key with scancode %d ", scancode); + if (keytyp == KT_LATIN || keytyp == KT_LETTER) { + if (keyval < ' ') + pr_cont("('^%c') ", keyval + '@'); + else + pr_cont("('%c') ", keyval); + } + pr_cont("is broken -- will be ignored.\n"); + break; + } else if (test_bit(scancode, broken_keys)) + break; + + if (atari_input_keyboard_interrupt_hook) + atari_input_keyboard_interrupt_hook((unsigned char)scancode, !break_flag); + break; + } + break; + + case AMOUSE: + kb_state.buf[kb_state.len++] = scancode; + if (kb_state.len == 5) { + kb_state.state = KEYBOARD; + /* not yet used */ + /* wake up someone waiting for this */ + } + break; + + case RMOUSE: + kb_state.buf[kb_state.len++] = scancode; + if (kb_state.len == 3) { + kb_state.state = KEYBOARD; + if (atari_input_mouse_interrupt_hook) + atari_input_mouse_interrupt_hook(kb_state.buf); + } + break; + + case JOYSTICK: + kb_state.buf[1] = scancode; + kb_state.state = KEYBOARD; +#ifdef FIXED_ATARI_JOYSTICK + atari_joystick_interrupt(kb_state.buf); +#endif + break; + + case CLOCK: + kb_state.buf[kb_state.len++] = scancode; + if (kb_state.len == 6) { + kb_state.state = KEYBOARD; + /* wake up someone waiting for this. + But will this ever be used, as Linux keeps its own time. + Perhaps for synchronization purposes? */ + /* wake_up_interruptible(&clock_wait); */ + } + break; + + case RESYNC: + if (kb_state.len <= 0 || IS_SYNC_CODE(scancode)) { + kb_state.state = KEYBOARD; + goto interpret_scancode; + } + kb_state.len--; + break; + } + } + +#if 0 + if (acia_stat & ACIA_CTS) + /* cannot happen */; +#endif + + if (acia_stat & (ACIA_FE | ACIA_PE)) { + pr_err("Error in keyboard communication\n"); + } + + /* handle_scancode() can take a lot of time, so check again if + * some character arrived + */ + goto repeat; +} + +/* + * I write to the keyboard without using interrupts, I poll instead. + * This takes for the maximum length string allowed (7) at 7812.5 baud + * 8 data 1 start 1 stop bit: 9.0 ms + * If this takes too long for normal operation, interrupt driven writing + * is the solution. (I made a feeble attempt in that direction but I + * kept it simple for now.) + */ +void ikbd_write(const char *str, int len) +{ + u_char acia_stat; + + if ((len < 1) || (len > 7)) + panic("ikbd: maximum string length exceeded"); + while (len) { + acia_stat = acia.key_ctrl; + if (acia_stat & ACIA_TDRE) { + acia.key_data = *str++; + len--; + } + } +} + +/* Reset (without touching the clock) */ +void ikbd_reset(void) +{ + static const char cmd[2] = { 0x80, 0x01 }; + + ikbd_write(cmd, 2); + + /* + * if all's well code 0xF1 is returned, else the break codes of + * all keys making contact + */ +} + +/* Set mouse button action */ +void ikbd_mouse_button_action(int mode) +{ + char cmd[2] = { 0x07, mode }; + + ikbd_write(cmd, 2); +} + +/* Set relative mouse position reporting */ +void ikbd_mouse_rel_pos(void) +{ + static const char cmd[1] = { 0x08 }; + + ikbd_write(cmd, 1); +} +EXPORT_SYMBOL(ikbd_mouse_rel_pos); + +/* Set absolute mouse position reporting */ +void ikbd_mouse_abs_pos(int xmax, int ymax) +{ + char cmd[5] = { 0x09, xmax>>8, xmax&0xFF, ymax>>8, ymax&0xFF }; + + ikbd_write(cmd, 5); +} + +/* Set mouse keycode mode */ +void ikbd_mouse_kbd_mode(int dx, int dy) +{ + char cmd[3] = { 0x0A, dx, dy }; + + ikbd_write(cmd, 3); +} + +/* Set mouse threshold */ +void ikbd_mouse_thresh(int x, int y) +{ + char cmd[3] = { 0x0B, x, y }; + + ikbd_write(cmd, 3); +} +EXPORT_SYMBOL(ikbd_mouse_thresh); + +/* Set mouse scale */ +void ikbd_mouse_scale(int x, int y) +{ + char cmd[3] = { 0x0C, x, y }; + + ikbd_write(cmd, 3); +} + +/* Interrogate mouse position */ +void ikbd_mouse_pos_get(int *x, int *y) +{ + static const char cmd[1] = { 0x0D }; + + ikbd_write(cmd, 1); + + /* wait for returning bytes */ +} + +/* Load mouse position */ +void ikbd_mouse_pos_set(int x, int y) +{ + char cmd[6] = { 0x0E, 0x00, x>>8, x&0xFF, y>>8, y&0xFF }; + + ikbd_write(cmd, 6); +} + +/* Set Y=0 at bottom */ +void ikbd_mouse_y0_bot(void) +{ + static const char cmd[1] = { 0x0F }; + + ikbd_write(cmd, 1); +} + +/* Set Y=0 at top */ +void ikbd_mouse_y0_top(void) +{ + static const char cmd[1] = { 0x10 }; + + ikbd_write(cmd, 1); +} +EXPORT_SYMBOL(ikbd_mouse_y0_top); + +/* Disable mouse */ +void ikbd_mouse_disable(void) +{ + static const char cmd[1] = { 0x12 }; + + ikbd_write(cmd, 1); +} +EXPORT_SYMBOL(ikbd_mouse_disable); + +/* Set joystick event reporting */ +void ikbd_joystick_event_on(void) +{ + static const char cmd[1] = { 0x14 }; + + ikbd_write(cmd, 1); +} + +/* Set joystick interrogation mode */ +void ikbd_joystick_event_off(void) +{ + static const char cmd[1] = { 0x15 }; + + ikbd_write(cmd, 1); +} + +/* Joystick interrogation */ +void ikbd_joystick_get_state(void) +{ + static const char cmd[1] = { 0x16 }; + + ikbd_write(cmd, 1); +} + +#if 0 +/* This disables all other ikbd activities !!!! */ +/* Set joystick monitoring */ +void ikbd_joystick_monitor(int rate) +{ + static const char cmd[2] = { 0x17, rate }; + + ikbd_write(cmd, 2); + + kb_state.state = JOYSTICK_MONITOR; +} +#endif + +/* some joystick routines not in yet (0x18-0x19) */ + +/* Disable joysticks */ +void ikbd_joystick_disable(void) +{ + static const char cmd[1] = { 0x1A }; + + ikbd_write(cmd, 1); +} + +/* + * The original code sometimes left the interrupt line of + * the ACIAs low forever. I hope, it is fixed now. + * + * Martin Rogge, 20 Aug 1995 + */ + +static int atari_keyb_done = 0; + +int atari_keyb_init(void) +{ + int error; + + if (atari_keyb_done) + return 0; + + kb_state.state = KEYBOARD; + kb_state.len = 0; + + error = request_irq(IRQ_MFP_ACIA, atari_keyboard_interrupt, 0, + "keyboard,mouse,MIDI", atari_keyboard_interrupt); + if (error) + return error; + + atari_turnoff_irq(IRQ_MFP_ACIA); + do { + /* reset IKBD ACIA */ + acia.key_ctrl = ACIA_RESET | + ((atari_switches & ATARI_SWITCH_IKBD) ? + ACIA_RHTID : 0); + (void)acia.key_ctrl; + (void)acia.key_data; + + /* reset MIDI ACIA */ + acia.mid_ctrl = ACIA_RESET | + ((atari_switches & ATARI_SWITCH_MIDI) ? + ACIA_RHTID : 0); + (void)acia.mid_ctrl; + (void)acia.mid_data; + + /* divide 500kHz by 64 gives 7812.5 baud */ + /* 8 data no parity 1 start 1 stop bit */ + /* receive interrupt enabled */ + /* RTS low (except if switch selected), transmit interrupt disabled */ + acia.key_ctrl = (ACIA_DIV64|ACIA_D8N1S|ACIA_RIE) | + ((atari_switches & ATARI_SWITCH_IKBD) ? + ACIA_RHTID : ACIA_RLTID); + + acia.mid_ctrl = ACIA_DIV16 | ACIA_D8N1S | + ((atari_switches & ATARI_SWITCH_MIDI) ? + ACIA_RHTID : 0); + + /* make sure the interrupt line is up */ + } while ((st_mfp.par_dt_reg & 0x10) == 0); + + /* enable ACIA Interrupts */ + st_mfp.active_edge &= ~0x10; + atari_turnon_irq(IRQ_MFP_ACIA); + + ikbd_self_test = 1; + ikbd_reset(); + /* wait for a period of inactivity (here: 0.25s), then assume the IKBD's + * self-test is finished */ + self_test_last_rcv = jiffies; + while (time_before(jiffies, self_test_last_rcv + HZ/4)) + barrier(); + /* if not incremented: no 0xf1 received */ + if (ikbd_self_test == 1) + pr_err("Keyboard self test failed!\n"); + ikbd_self_test = 0; + + ikbd_mouse_disable(); + ikbd_joystick_disable(); + +#ifdef FIXED_ATARI_JOYSTICK + atari_joystick_init(); +#endif + + // flag init done + atari_keyb_done = 1; + return 0; +} +EXPORT_SYMBOL_GPL(atari_keyb_init); diff --git a/arch/m68k/atari/atasound.c b/arch/m68k/atari/atasound.c new file mode 100644 index 000000000..a8724d998 --- /dev/null +++ b/arch/m68k/atari/atasound.c @@ -0,0 +1,109 @@ +/* + * linux/arch/m68k/atari/atasound.c + * + * ++Geert: Moved almost all stuff to linux/drivers/sound/ + * + * The author of atari_nosound, atari_mksound and atari_microwire_cmd is + * unknown. (++roman: That's me... :-) + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file COPYING in the main directory of this archive + * for more details. + * + * 1998-05-31 ++andreas: atari_mksound rewritten to always use the envelope, + * no timer, atari_nosound removed. + * + */ + + +#include <linux/sched.h> +#include <linux/timer.h> +#include <linux/major.h> +#include <linux/fcntl.h> +#include <linux/errno.h> +#include <linux/mm.h> +#include <linux/module.h> + +#include <asm/atarihw.h> +#include <asm/irq.h> +#include <asm/atariints.h> + + +/* + * stuff from the old atasound.c + */ + +void atari_microwire_cmd (int cmd) +{ + tt_microwire.mask = 0x7ff; + tt_microwire.data = MW_LM1992_ADDR | cmd; + + /* Busy wait for data being completely sent :-( */ + while( tt_microwire.mask != 0x7ff) + ; +} +EXPORT_SYMBOL(atari_microwire_cmd); + + +/* PSG base frequency */ +#define PSG_FREQ 125000 +/* PSG envelope base frequency times 10 */ +#define PSG_ENV_FREQ_10 78125 + +void atari_mksound (unsigned int hz, unsigned int ticks) +{ + /* Generates sound of some frequency for some number of clock + ticks. */ + unsigned long flags; + unsigned char tmp; + int period; + + local_irq_save(flags); + + + /* Disable generator A in mixer control. */ + sound_ym.rd_data_reg_sel = 7; + tmp = sound_ym.rd_data_reg_sel; + tmp |= 011; + sound_ym.wd_data = tmp; + + if (hz) { + /* Convert from frequency value to PSG period value (base + frequency 125 kHz). */ + + period = PSG_FREQ / hz; + + if (period > 0xfff) period = 0xfff; + + /* Set generator A frequency to hz. */ + sound_ym.rd_data_reg_sel = 0; + sound_ym.wd_data = period & 0xff; + sound_ym.rd_data_reg_sel = 1; + sound_ym.wd_data = (period >> 8) & 0xf; + if (ticks) { + /* Set length of envelope (max 8 sec). */ + int length = (ticks * PSG_ENV_FREQ_10) / HZ / 10; + + if (length > 0xffff) length = 0xffff; + sound_ym.rd_data_reg_sel = 11; + sound_ym.wd_data = length & 0xff; + sound_ym.rd_data_reg_sel = 12; + sound_ym.wd_data = length >> 8; + /* Envelope form: max -> min single. */ + sound_ym.rd_data_reg_sel = 13; + sound_ym.wd_data = 0; + /* Use envelope for generator A. */ + sound_ym.rd_data_reg_sel = 8; + sound_ym.wd_data = 0x10; + } else { + /* Set generator A level to maximum, no envelope. */ + sound_ym.rd_data_reg_sel = 8; + sound_ym.wd_data = 15; + } + /* Turn on generator A in mixer control. */ + sound_ym.rd_data_reg_sel = 7; + tmp &= ~1; + sound_ym.wd_data = tmp; + } + local_irq_restore(flags); +} diff --git a/arch/m68k/atari/config.c b/arch/m68k/atari/config.c new file mode 100644 index 000000000..38a7c0578 --- /dev/null +++ b/arch/m68k/atari/config.c @@ -0,0 +1,937 @@ +/* + * linux/arch/m68k/atari/config.c + * + * Copyright (C) 1994 Bjoern Brauel + * + * 5/2/94 Roman Hodek: + * Added setting of time_adj to get a better clock. + * + * 5/14/94 Roman Hodek: + * gettod() for TT + * + * 5/15/94 Roman Hodek: + * hard_reset_now() for Atari (and others?) + * + * 94/12/30 Andreas Schwab: + * atari_sched_init fixed to get precise clock. + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file COPYING in the main directory of this archive + * for more details. + */ + +/* + * Miscellaneous atari stuff + */ + +#include <linux/types.h> +#include <linux/mm.h> +#include <linux/seq_file.h> +#include <linux/console.h> +#include <linux/init.h> +#include <linux/delay.h> +#include <linux/ioport.h> +#include <linux/platform_device.h> +#include <linux/usb/isp116x.h> +#include <linux/vt_kern.h> +#include <linux/module.h> + +#include <asm/bootinfo.h> +#include <asm/bootinfo-atari.h> +#include <asm/byteorder.h> +#include <asm/setup.h> +#include <asm/atarihw.h> +#include <asm/atariints.h> +#include <asm/atari_stram.h> +#include <asm/machdep.h> +#include <asm/hwtest.h> +#include <asm/io.h> +#include <asm/config.h> + +u_long atari_mch_cookie; +EXPORT_SYMBOL(atari_mch_cookie); + +u_long atari_mch_type; +EXPORT_SYMBOL(atari_mch_type); + +struct atari_hw_present atari_hw_present; +EXPORT_SYMBOL(atari_hw_present); + +u_long atari_switches; +EXPORT_SYMBOL(atari_switches); + +int atari_dont_touch_floppy_select; +EXPORT_SYMBOL(atari_dont_touch_floppy_select); + +int atari_rtc_year_offset; + +/* local function prototypes */ +static void atari_reset(void); +static void atari_get_model(char *model); +static void atari_get_hardware_list(struct seq_file *m); + +/* atari specific irq functions */ +extern void atari_init_IRQ (void); +extern void atari_mksound(unsigned int count, unsigned int ticks); +#ifdef CONFIG_HEARTBEAT +static void atari_heartbeat(int on); +#endif + +/* atari specific timer functions (in time.c) */ +extern void atari_sched_init(void); +extern int atari_mste_hwclk (int, struct rtc_time *); +extern int atari_tt_hwclk (int, struct rtc_time *); + +/* ++roman: This is a more elaborate test for an SCC chip, since the plain + * Medusa board generates DTACK at the SCC's standard addresses, but a SCC + * board in the Medusa is possible. Also, the addresses where the ST_ESCC + * resides generate DTACK without the chip, too. + * The method is to write values into the interrupt vector register, that + * should be readable without trouble (from channel A!). + */ + +static int __init scc_test(volatile char *ctla) +{ + if (!hwreg_present(ctla)) + return 0; + MFPDELAY(); + + *ctla = 2; + MFPDELAY(); + *ctla = 0x40; + MFPDELAY(); + + *ctla = 2; + MFPDELAY(); + if (*ctla != 0x40) + return 0; + MFPDELAY(); + + *ctla = 2; + MFPDELAY(); + *ctla = 0x60; + MFPDELAY(); + + *ctla = 2; + MFPDELAY(); + if (*ctla != 0x60) + return 0; + + return 1; +} + + + /* + * Parse an Atari-specific record in the bootinfo + */ + +int __init atari_parse_bootinfo(const struct bi_record *record) +{ + int unknown = 0; + const void *data = record->data; + + switch (be16_to_cpu(record->tag)) { + case BI_ATARI_MCH_COOKIE: + atari_mch_cookie = be32_to_cpup(data); + break; + case BI_ATARI_MCH_TYPE: + atari_mch_type = be32_to_cpup(data); + break; + default: + unknown = 1; + break; + } + return unknown; +} + + +/* Parse the Atari-specific switches= option. */ +static int __init atari_switches_setup(char *str) +{ + char switches[COMMAND_LINE_SIZE]; + char *p; + int ovsc_shift; + char *args = switches; + + if (!MACH_IS_ATARI) + return 0; + + /* copy string to local array, strsep works destructively... */ + strcpy(switches, str); + atari_switches = 0; + + /* parse the options */ + while ((p = strsep(&args, ",")) != NULL) { + if (!*p) + continue; + ovsc_shift = 0; + if (strncmp(p, "ov_", 3) == 0) { + p += 3; + ovsc_shift = ATARI_SWITCH_OVSC_SHIFT; + } + + if (strcmp(p, "ikbd") == 0) { + /* RTS line of IKBD ACIA */ + atari_switches |= ATARI_SWITCH_IKBD << ovsc_shift; + } else if (strcmp(p, "midi") == 0) { + /* RTS line of MIDI ACIA */ + atari_switches |= ATARI_SWITCH_MIDI << ovsc_shift; + } else if (strcmp(p, "snd6") == 0) { + atari_switches |= ATARI_SWITCH_SND6 << ovsc_shift; + } else if (strcmp(p, "snd7") == 0) { + atari_switches |= ATARI_SWITCH_SND7 << ovsc_shift; + } + } + return 0; +} + +early_param("switches", atari_switches_setup); + + + /* + * Setup the Atari configuration info + */ + +void __init config_atari(void) +{ + unsigned short tos_version; + + memset(&atari_hw_present, 0, sizeof(atari_hw_present)); + + /* Change size of I/O space from 64KB to 4GB. */ + ioport_resource.end = 0xFFFFFFFF; + + mach_sched_init = atari_sched_init; + mach_init_IRQ = atari_init_IRQ; + mach_get_model = atari_get_model; + mach_get_hardware_list = atari_get_hardware_list; + mach_reset = atari_reset; +#if IS_ENABLED(CONFIG_INPUT_M68K_BEEP) + mach_beep = atari_mksound; +#endif +#ifdef CONFIG_HEARTBEAT + mach_heartbeat = atari_heartbeat; +#endif + + /* Set switches as requested by the user */ + if (atari_switches & ATARI_SWITCH_IKBD) + acia.key_ctrl = ACIA_DIV64 | ACIA_D8N1S | ACIA_RHTID; + if (atari_switches & ATARI_SWITCH_MIDI) + acia.mid_ctrl = ACIA_DIV16 | ACIA_D8N1S | ACIA_RHTID; + if (atari_switches & (ATARI_SWITCH_SND6|ATARI_SWITCH_SND7)) { + sound_ym.rd_data_reg_sel = 14; + sound_ym.wd_data = sound_ym.rd_data_reg_sel | + ((atari_switches&ATARI_SWITCH_SND6) ? 0x40 : 0) | + ((atari_switches&ATARI_SWITCH_SND7) ? 0x80 : 0); + } + + /* ++bjoern: + * Determine hardware present + */ + + pr_info("Atari hardware found:"); + if (MACH_IS_MEDUSA) { + /* There's no Atari video hardware on the Medusa, but all the + * addresses below generate a DTACK so no bus error occurs! */ + } else if (hwreg_present(f030_xreg)) { + ATARIHW_SET(VIDEL_SHIFTER); + pr_cont(" VIDEL"); + /* This is a temporary hack: If there is Falcon video + * hardware, we assume that the ST-DMA serves SCSI instead of + * ACSI. In the future, there should be a better method for + * this... + */ + ATARIHW_SET(ST_SCSI); + pr_cont(" STDMA-SCSI"); + } else if (hwreg_present(tt_palette)) { + ATARIHW_SET(TT_SHIFTER); + pr_cont(" TT_SHIFTER"); + } else if (hwreg_present(&shifter_st.bas_hi)) { + if (hwreg_present(&shifter_st.bas_lo) && + (shifter_st.bas_lo = 0x0aau, shifter_st.bas_lo == 0x0aau)) { + ATARIHW_SET(EXTD_SHIFTER); + pr_cont(" EXTD_SHIFTER"); + } else { + ATARIHW_SET(STND_SHIFTER); + pr_cont(" STND_SHIFTER"); + } + } + if (hwreg_present(&st_mfp.par_dt_reg)) { + ATARIHW_SET(ST_MFP); + pr_cont(" ST_MFP"); + } + if (hwreg_present(&tt_mfp.par_dt_reg)) { + ATARIHW_SET(TT_MFP); + pr_cont(" TT_MFP"); + } + if (hwreg_present(&tt_scsi_dma.dma_addr_hi)) { + ATARIHW_SET(SCSI_DMA); + pr_cont(" TT_SCSI_DMA"); + } + /* + * The ST-DMA address registers aren't readable + * on all Medusas, so the test below may fail + */ + if (MACH_IS_MEDUSA || + (hwreg_present(&st_dma.dma_vhi) && + (st_dma.dma_vhi = 0x55) && (st_dma.dma_hi = 0xaa) && + st_dma.dma_vhi == 0x55 && st_dma.dma_hi == 0xaa && + (st_dma.dma_vhi = 0xaa) && (st_dma.dma_hi = 0x55) && + st_dma.dma_vhi == 0xaa && st_dma.dma_hi == 0x55)) { + ATARIHW_SET(EXTD_DMA); + pr_cont(" EXTD_DMA"); + } + if (hwreg_present(&tt_scsi.scsi_data)) { + ATARIHW_SET(TT_SCSI); + pr_cont(" TT_SCSI"); + } + if (hwreg_present(&sound_ym.rd_data_reg_sel)) { + ATARIHW_SET(YM_2149); + pr_cont(" YM2149"); + } + if (!MACH_IS_MEDUSA && hwreg_present(&tt_dmasnd.ctrl)) { + ATARIHW_SET(PCM_8BIT); + pr_cont(" PCM"); + } + if (hwreg_present(&falcon_codec.unused5)) { + ATARIHW_SET(CODEC); + pr_cont(" CODEC"); + } + if (hwreg_present(&dsp56k_host_interface.icr)) { + ATARIHW_SET(DSP56K); + pr_cont(" DSP56K"); + } + if (hwreg_present(&tt_scc_dma.dma_ctrl) && +#if 0 + /* This test sucks! Who knows some better? */ + (tt_scc_dma.dma_ctrl = 0x01, (tt_scc_dma.dma_ctrl & 1) == 1) && + (tt_scc_dma.dma_ctrl = 0x00, (tt_scc_dma.dma_ctrl & 1) == 0) +#else + !MACH_IS_MEDUSA +#endif + ) { + ATARIHW_SET(SCC_DMA); + pr_cont(" SCC_DMA"); + } + if (scc_test(&atari_scc.cha_a_ctrl)) { + ATARIHW_SET(SCC); + pr_cont(" SCC"); + } + if (scc_test(&st_escc.cha_b_ctrl)) { + ATARIHW_SET(ST_ESCC); + pr_cont(" ST_ESCC"); + } + if (hwreg_present(&tt_scu.sys_mask)) { + ATARIHW_SET(SCU); + /* Assume a VME bus if there's a SCU */ + ATARIHW_SET(VME); + pr_cont(" VME SCU"); + } + if (hwreg_present((void *)(0xffff9210))) { + ATARIHW_SET(ANALOG_JOY); + pr_cont(" ANALOG_JOY"); + } + if (hwreg_present(blitter.halftone)) { + ATARIHW_SET(BLITTER); + pr_cont(" BLITTER"); + } + if (hwreg_present((void *)0xfff00039)) { + ATARIHW_SET(IDE); + pr_cont(" IDE"); + } +#if 1 /* This maybe wrong */ + if (!MACH_IS_MEDUSA && hwreg_present(&tt_microwire.data) && + hwreg_present(&tt_microwire.mask) && + (tt_microwire.mask = 0x7ff, + udelay(1), + tt_microwire.data = MW_LM1992_PSG_HIGH | MW_LM1992_ADDR, + udelay(1), + tt_microwire.data != 0)) { + ATARIHW_SET(MICROWIRE); + while (tt_microwire.mask != 0x7ff) + ; + pr_cont(" MICROWIRE"); + } +#endif + if (hwreg_present(&tt_rtc.regsel)) { + ATARIHW_SET(TT_CLK); + pr_cont(" TT_CLK"); + mach_hwclk = atari_tt_hwclk; + } + if (hwreg_present(&mste_rtc.sec_ones)) { + ATARIHW_SET(MSTE_CLK); + pr_cont(" MSTE_CLK"); + mach_hwclk = atari_mste_hwclk; + } + if (!MACH_IS_MEDUSA && hwreg_present(&dma_wd.fdc_speed) && + hwreg_write(&dma_wd.fdc_speed, 0)) { + ATARIHW_SET(FDCSPEED); + pr_cont(" FDC_SPEED"); + } + if (!ATARIHW_PRESENT(ST_SCSI)) { + ATARIHW_SET(ACSI); + pr_cont(" ACSI"); + } + pr_cont("\n"); + + if (CPU_IS_040_OR_060) + /* Now it seems to be safe to turn of the tt0 transparent + * translation (the one that must not be turned off in + * head.S...) + */ + asm volatile ("\n" + " moveq #0,%%d0\n" + " .chip 68040\n" + " movec %%d0,%%itt0\n" + " movec %%d0,%%dtt0\n" + " .chip 68k" + : /* no outputs */ + : /* no inputs */ + : "d0"); + + /* allocator for memory that must reside in st-ram */ + atari_stram_init(); + + /* Set up a mapping for the VMEbus address region: + * + * VME is either at phys. 0xfexxxxxx (TT) or 0xa00000..0xdfffff + * (MegaSTE) In both cases, the whole 16 MB chunk is mapped at + * 0xfe000000 virt., because this can be done with a single + * transparent translation. On the 68040, lots of often unused + * page tables would be needed otherwise. On a MegaSTE or similar, + * the highest byte is stripped off by hardware due to the 24 bit + * design of the bus. + */ + + if (CPU_IS_020_OR_030) { + unsigned long tt1_val; + tt1_val = 0xfe008543; /* Translate 0xfexxxxxx, enable, cache + * inhibit, read and write, FDC mask = 3, + * FDC val = 4 -> Supervisor only */ + asm volatile ("\n" + " .chip 68030\n" + " pmove %0,%/tt1\n" + " .chip 68k" + : : "m" (tt1_val)); + } else { + asm volatile ("\n" + " .chip 68040\n" + " movec %0,%%itt1\n" + " movec %0,%%dtt1\n" + " .chip 68k" + : + : "d" (0xfe00a040)); /* Translate 0xfexxxxxx, enable, + * supervisor only, non-cacheable/ + * serialized, writable */ + + } + + /* Fetch tos version at Physical 2 */ + /* + * We my not be able to access this address if the kernel is + * loaded to st ram, since the first page is unmapped. On the + * Medusa this is always the case and there is nothing we can do + * about this, so we just assume the smaller offset. For the TT + * we use the fact that in head.S we have set up a mapping + * 0xFFxxxxxx -> 0x00xxxxxx, so that the first 16MB is accessible + * in the last 16MB of the address space. + */ + tos_version = (MACH_IS_MEDUSA) ? + 0xfff : *(unsigned short *)0xff000002; + atari_rtc_year_offset = (tos_version < 0x306) ? 70 : 68; +} + +#ifdef CONFIG_HEARTBEAT +static void atari_heartbeat(int on) +{ + unsigned char tmp; + unsigned long flags; + + if (atari_dont_touch_floppy_select) + return; + + local_irq_save(flags); + sound_ym.rd_data_reg_sel = 14; /* Select PSG Port A */ + tmp = sound_ym.rd_data_reg_sel; + sound_ym.wd_data = on ? (tmp & ~0x02) : (tmp | 0x02); + local_irq_restore(flags); +} +#endif + +/* ++roman: + * + * This function does a reset on machines that lack the ability to + * assert the processor's _RESET signal somehow via hardware. It is + * based on the fact that you can find the initial SP and PC values + * after a reset at physical addresses 0 and 4. This works pretty well + * for Atari machines, since the lowest 8 bytes of physical memory are + * really ROM (mapped by hardware). For other 680x0 machines: don't + * know if it works... + * + * To get the values at addresses 0 and 4, the MMU better is turned + * off first. After that, we have to jump into physical address space + * (the PC before the pmove statement points to the virtual address of + * the code). Getting that physical address is not hard, but the code + * becomes a bit complex since I've tried to ensure that the jump + * statement after the pmove is in the cache already (otherwise the + * processor can't fetch it!). For that, the code first jumps to the + * jump statement with the (virtual) address of the pmove section in + * an address register . The jump statement is surely in the cache + * now. After that, that physical address of the reset code is loaded + * into the same address register, pmove is done and the same jump + * statements goes to the reset code. Since there are not many + * statements between the two jumps, I hope it stays in the cache. + * + * The C code makes heavy use of the GCC features that you can get the + * address of a C label. No hope to compile this with another compiler + * than GCC! + */ + +/* ++andreas: no need for complicated code, just depend on prefetch */ + +static void atari_reset(void) +{ + long tc_val = 0; + long reset_addr; + + /* + * On the Medusa, phys. 0x4 may contain garbage because it's no + * ROM. See above for explanation why we cannot use PTOV(4). + */ + reset_addr = MACH_IS_MEDUSA || MACH_IS_AB40 ? 0xe00030 : + *(unsigned long *) 0xff000004; + + /* reset ACIA for switch off OverScan, if it's active */ + if (atari_switches & ATARI_SWITCH_OVSC_IKBD) + acia.key_ctrl = ACIA_RESET; + if (atari_switches & ATARI_SWITCH_OVSC_MIDI) + acia.mid_ctrl = ACIA_RESET; + + /* processor independent: turn off interrupts and reset the VBR; + * the caches must be left enabled, else prefetching the final jump + * instruction doesn't work. + */ + local_irq_disable(); + asm volatile ("movec %0,%%vbr" + : : "d" (0)); + + if (CPU_IS_040_OR_060) { + unsigned long jmp_addr040 = virt_to_phys(&&jmp_addr_label040); + if (CPU_IS_060) { + /* 68060: clear PCR to turn off superscalar operation */ + asm volatile ("\n" + " .chip 68060\n" + " movec %0,%%pcr\n" + " .chip 68k" + : : "d" (0)); + } + + asm volatile ("\n" + " move.l %0,%%d0\n" + " and.l #0xff000000,%%d0\n" + " or.w #0xe020,%%d0\n" /* map 16 MB, enable, cacheable */ + " .chip 68040\n" + " movec %%d0,%%itt0\n" + " movec %%d0,%%dtt0\n" + " .chip 68k\n" + " jmp %0@" + : : "a" (jmp_addr040) + : "d0"); + jmp_addr_label040: + asm volatile ("\n" + " moveq #0,%%d0\n" + " nop\n" + " .chip 68040\n" + " cinva %%bc\n" + " nop\n" + " pflusha\n" + " nop\n" + " movec %%d0,%%tc\n" + " nop\n" + /* the following setup of transparent translations is needed on the + * Afterburner040 to successfully reboot. Other machines shouldn't + * care about a different tt regs setup, they also didn't care in + * the past that the regs weren't turned off. */ + " move.l #0xffc000,%%d0\n" /* whole insn space cacheable */ + " movec %%d0,%%itt0\n" + " movec %%d0,%%itt1\n" + " or.w #0x40,%/d0\n" /* whole data space non-cacheable/ser. */ + " movec %%d0,%%dtt0\n" + " movec %%d0,%%dtt1\n" + " .chip 68k\n" + " jmp %0@" + : /* no outputs */ + : "a" (reset_addr) + : "d0"); + } else + asm volatile ("\n" + " pmove %0,%%tc\n" + " jmp %1@" + : /* no outputs */ + : "m" (tc_val), "a" (reset_addr)); +} + + +static void atari_get_model(char *model) +{ + strcpy(model, "Atari "); + switch (atari_mch_cookie >> 16) { + case ATARI_MCH_ST: + if (ATARIHW_PRESENT(MSTE_CLK)) + strcat(model, "Mega ST"); + else + strcat(model, "ST"); + break; + case ATARI_MCH_STE: + if (MACH_IS_MSTE) + strcat(model, "Mega STE"); + else + strcat(model, "STE"); + break; + case ATARI_MCH_TT: + if (MACH_IS_MEDUSA) + /* Medusa has TT _MCH cookie */ + strcat(model, "Medusa"); + else + strcat(model, "TT"); + break; + case ATARI_MCH_FALCON: + strcat(model, "Falcon"); + if (MACH_IS_AB40) + strcat(model, " (with Afterburner040)"); + break; + default: + sprintf(model + strlen(model), "(unknown mach cookie 0x%lx)", + atari_mch_cookie); + break; + } +} + + +static void atari_get_hardware_list(struct seq_file *m) +{ + int i; + + for (i = 0; i < m68k_num_memory; i++) + seq_printf(m, "\t%3ld MB at 0x%08lx (%s)\n", + m68k_memory[i].size >> 20, m68k_memory[i].addr, + (m68k_memory[i].addr & 0xff000000 ? + "alternate RAM" : "ST-RAM")); + +#define ATARIHW_ANNOUNCE(name, str) \ + if (ATARIHW_PRESENT(name)) \ + seq_printf(m, "\t%s\n", str) + + seq_puts(m, "Detected hardware:\n"); + ATARIHW_ANNOUNCE(STND_SHIFTER, "ST Shifter"); + ATARIHW_ANNOUNCE(EXTD_SHIFTER, "STe Shifter"); + ATARIHW_ANNOUNCE(TT_SHIFTER, "TT Shifter"); + ATARIHW_ANNOUNCE(VIDEL_SHIFTER, "Falcon Shifter"); + ATARIHW_ANNOUNCE(YM_2149, "Programmable Sound Generator"); + ATARIHW_ANNOUNCE(PCM_8BIT, "PCM 8 Bit Sound"); + ATARIHW_ANNOUNCE(CODEC, "CODEC Sound"); + ATARIHW_ANNOUNCE(TT_SCSI, "SCSI Controller NCR5380 (TT style)"); + ATARIHW_ANNOUNCE(ST_SCSI, "SCSI Controller NCR5380 (Falcon style)"); + ATARIHW_ANNOUNCE(ACSI, "ACSI Interface"); + ATARIHW_ANNOUNCE(IDE, "IDE Interface"); + ATARIHW_ANNOUNCE(FDCSPEED, "8/16 Mhz Switch for FDC"); + ATARIHW_ANNOUNCE(ST_MFP, "Multi Function Peripheral MFP 68901"); + ATARIHW_ANNOUNCE(TT_MFP, "Second Multi Function Peripheral MFP 68901"); + ATARIHW_ANNOUNCE(SCC, "Serial Communications Controller SCC 8530"); + ATARIHW_ANNOUNCE(ST_ESCC, "Extended Serial Communications Controller SCC 85230"); + ATARIHW_ANNOUNCE(ANALOG_JOY, "Paddle Interface"); + ATARIHW_ANNOUNCE(MICROWIRE, "MICROWIRE(tm) Interface"); + ATARIHW_ANNOUNCE(STND_DMA, "DMA Controller (24 bit)"); + ATARIHW_ANNOUNCE(EXTD_DMA, "DMA Controller (32 bit)"); + ATARIHW_ANNOUNCE(SCSI_DMA, "DMA Controller for NCR5380"); + ATARIHW_ANNOUNCE(SCC_DMA, "DMA Controller for SCC"); + ATARIHW_ANNOUNCE(TT_CLK, "Clock Chip MC146818A"); + ATARIHW_ANNOUNCE(MSTE_CLK, "Clock Chip RP5C15"); + ATARIHW_ANNOUNCE(SCU, "System Control Unit"); + ATARIHW_ANNOUNCE(BLITTER, "Blitter"); + ATARIHW_ANNOUNCE(VME, "VME Bus"); + ATARIHW_ANNOUNCE(DSP56K, "DSP56001 processor"); +} + +/* + * MSch: initial platform device support for Atari, + * required for EtherNAT/EtherNEC/NetUSBee drivers + */ + +#if defined(CONFIG_ATARI_ETHERNAT) || defined(CONFIG_ATARI_ETHERNEC) +static void isp1160_delay(struct device *dev, int delay) +{ + ndelay(delay); +} +#endif + +#ifdef CONFIG_ATARI_ETHERNAT +/* + * EtherNAT: SMC91C111 Ethernet chipset, handled by smc91x driver + */ + +#define ATARI_ETHERNAT_IRQ 140 + +static struct resource smc91x_resources[] = { + [0] = { + .name = "smc91x-regs", + .start = ATARI_ETHERNAT_PHYS_ADDR, + .end = ATARI_ETHERNAT_PHYS_ADDR + 0xfffff, + .flags = IORESOURCE_MEM, + }, + [1] = { + .name = "smc91x-irq", + .start = ATARI_ETHERNAT_IRQ, + .end = ATARI_ETHERNAT_IRQ, + .flags = IORESOURCE_IRQ, + }, +}; + +static struct platform_device smc91x_device = { + .name = "smc91x", + .id = -1, + .num_resources = ARRAY_SIZE(smc91x_resources), + .resource = smc91x_resources, +}; + +/* + * ISP 1160 - using the isp116x-hcd module + */ + +#define ATARI_USB_PHYS_ADDR 0x80000012 +#define ATARI_USB_IRQ 139 + +static struct resource isp1160_resources[] = { + [0] = { + .name = "isp1160-data", + .start = ATARI_USB_PHYS_ADDR, + .end = ATARI_USB_PHYS_ADDR + 0x1, + .flags = IORESOURCE_MEM, + }, + [1] = { + .name = "isp1160-regs", + .start = ATARI_USB_PHYS_ADDR + 0x4, + .end = ATARI_USB_PHYS_ADDR + 0x5, + .flags = IORESOURCE_MEM, + }, + [2] = { + .name = "isp1160-irq", + .start = ATARI_USB_IRQ, + .end = ATARI_USB_IRQ, + .flags = IORESOURCE_IRQ, + }, +}; + +/* (DataBusWidth16|AnalogOCEnable|DREQOutputPolarity|DownstreamPort15KRSel ) */ +static struct isp116x_platform_data isp1160_platform_data = { + /* Enable internal resistors on downstream ports */ + .sel15Kres = 1, + /* On-chip overcurrent protection */ + .oc_enable = 1, + /* INT output polarity */ + .int_act_high = 1, + /* INT edge or level triggered */ + .int_edge_triggered = 0, + + /* WAKEUP pin connected - NOT SUPPORTED */ + /* .remote_wakeup_connected = 0, */ + /* Wakeup by devices on usb bus enabled */ + .remote_wakeup_enable = 0, + .delay = isp1160_delay, +}; + +static struct platform_device isp1160_device = { + .name = "isp116x-hcd", + .id = 0, + .num_resources = ARRAY_SIZE(isp1160_resources), + .resource = isp1160_resources, + .dev = { + .platform_data = &isp1160_platform_data, + }, +}; + +static struct platform_device *atari_ethernat_devices[] __initdata = { + &smc91x_device, + &isp1160_device +}; +#endif /* CONFIG_ATARI_ETHERNAT */ + +#ifdef CONFIG_ATARI_ETHERNEC +/* + * EtherNEC: RTL8019 (NE2000 compatible) Ethernet chipset, + * handled by ne.c driver + */ + +#define ATARI_ETHERNEC_PHYS_ADDR 0xfffa0000 +#define ATARI_ETHERNEC_BASE 0x300 +#define ATARI_ETHERNEC_IRQ IRQ_MFP_TIMER1 + +static struct resource rtl8019_resources[] = { + [0] = { + .name = "rtl8019-regs", + .start = ATARI_ETHERNEC_BASE, + .end = ATARI_ETHERNEC_BASE + 0x20 - 1, + .flags = IORESOURCE_IO, + }, + [1] = { + .name = "rtl8019-irq", + .start = ATARI_ETHERNEC_IRQ, + .end = ATARI_ETHERNEC_IRQ, + .flags = IORESOURCE_IRQ, + }, +}; + +static struct platform_device rtl8019_device = { + .name = "ne", + .id = -1, + .num_resources = ARRAY_SIZE(rtl8019_resources), + .resource = rtl8019_resources, +}; + +/* + * NetUSBee: ISP1160 USB host adapter via ROM-port adapter + */ + +#define ATARI_NETUSBEE_PHYS_ADDR 0xfffa8000 +#define ATARI_NETUSBEE_BASE 0x340 +#define ATARI_NETUSBEE_IRQ IRQ_MFP_TIMER2 + +static struct resource netusbee_resources[] = { + [0] = { + .name = "isp1160-data", + .start = ATARI_NETUSBEE_BASE, + .end = ATARI_NETUSBEE_BASE + 0x1, + .flags = IORESOURCE_MEM, + }, + [1] = { + .name = "isp1160-regs", + .start = ATARI_NETUSBEE_BASE + 0x20, + .end = ATARI_NETUSBEE_BASE + 0x21, + .flags = IORESOURCE_MEM, + }, + [2] = { + .name = "isp1160-irq", + .start = ATARI_NETUSBEE_IRQ, + .end = ATARI_NETUSBEE_IRQ, + .flags = IORESOURCE_IRQ, + }, +}; + +/* (DataBusWidth16|AnalogOCEnable|DREQOutputPolarity|DownstreamPort15KRSel ) */ +static struct isp116x_platform_data netusbee_platform_data = { + /* Enable internal resistors on downstream ports */ + .sel15Kres = 1, + /* On-chip overcurrent protection */ + .oc_enable = 1, + /* INT output polarity */ + .int_act_high = 1, + /* INT edge or level triggered */ + .int_edge_triggered = 0, + + /* WAKEUP pin connected - NOT SUPPORTED */ + /* .remote_wakeup_connected = 0, */ + /* Wakeup by devices on usb bus enabled */ + .remote_wakeup_enable = 0, + .delay = isp1160_delay, +}; + +static struct platform_device netusbee_device = { + .name = "isp116x-hcd", + .id = 1, + .num_resources = ARRAY_SIZE(netusbee_resources), + .resource = netusbee_resources, + .dev = { + .platform_data = &netusbee_platform_data, + }, +}; + +static struct platform_device *atari_netusbee_devices[] __initdata = { + &rtl8019_device, + &netusbee_device +}; +#endif /* CONFIG_ATARI_ETHERNEC */ + +#if IS_ENABLED(CONFIG_ATARI_SCSI) +static const struct resource atari_scsi_st_rsrc[] __initconst = { + { + .flags = IORESOURCE_IRQ, + .start = IRQ_MFP_FSCSI, + .end = IRQ_MFP_FSCSI, + }, +}; + +static const struct resource atari_scsi_tt_rsrc[] __initconst = { + { + .flags = IORESOURCE_IRQ, + .start = IRQ_TT_MFP_SCSI, + .end = IRQ_TT_MFP_SCSI, + }, +}; +#endif + +/* + * Falcon IDE interface + */ + +#define FALCON_IDE_BASE 0xfff00000 + +static const struct resource atari_falconide_rsrc[] __initconst = { + DEFINE_RES_MEM(FALCON_IDE_BASE, 0x38), + DEFINE_RES_MEM(FALCON_IDE_BASE + 0x38, 2), +}; + +int __init atari_platform_init(void) +{ + struct platform_device *pdev; + int rv = 0; + + if (!MACH_IS_ATARI) + return -ENODEV; + +#ifdef CONFIG_ATARI_ETHERNAT + { + unsigned char *enatc_virt; + enatc_virt = (unsigned char *)ioremap((ATARI_ETHERNAT_PHYS_ADDR+0x23), 0xf); + if (hwreg_present(enatc_virt)) { + rv = platform_add_devices(atari_ethernat_devices, + ARRAY_SIZE(atari_ethernat_devices)); + } + iounmap(enatc_virt); + } +#endif + +#ifdef CONFIG_ATARI_ETHERNEC + { + int error; + unsigned char *enec_virt; + enec_virt = (unsigned char *)ioremap((ATARI_ETHERNEC_PHYS_ADDR), 0xf); + if (hwreg_present(enec_virt)) { + error = platform_add_devices(atari_netusbee_devices, + ARRAY_SIZE(atari_netusbee_devices)); + if (error && !rv) + rv = error; + } + iounmap(enec_virt); + } +#endif + +#if IS_ENABLED(CONFIG_ATARI_SCSI) + if (ATARIHW_PRESENT(ST_SCSI)) + platform_device_register_simple("atari_scsi", -1, + atari_scsi_st_rsrc, ARRAY_SIZE(atari_scsi_st_rsrc)); + else if (ATARIHW_PRESENT(TT_SCSI)) + platform_device_register_simple("atari_scsi", -1, + atari_scsi_tt_rsrc, ARRAY_SIZE(atari_scsi_tt_rsrc)); +#endif + + if (ATARIHW_PRESENT(IDE)) { + pdev = platform_device_register_simple("atari-falcon-ide", -1, + atari_falconide_rsrc, ARRAY_SIZE(atari_falconide_rsrc)); + if (IS_ERR(pdev)) + rv = PTR_ERR(pdev); + } + + return rv; +} + +arch_initcall(atari_platform_init); diff --git a/arch/m68k/atari/debug.c b/arch/m68k/atari/debug.c new file mode 100644 index 000000000..03cb5e08d --- /dev/null +++ b/arch/m68k/atari/debug.c @@ -0,0 +1,329 @@ +/* + * linux/arch/m68k/atari/debug.c + * + * Atari debugging and serial console stuff + * + * Assembled of parts of former atari/config.c 97-12-18 by Roman Hodek + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file COPYING in the main directory of this archive + * for more details. + */ + +#include <linux/types.h> +#include <linux/tty.h> +#include <linux/console.h> +#include <linux/init.h> +#include <linux/delay.h> +#include <linux/module.h> + +#include <asm/atarihw.h> +#include <asm/atariints.h> + +/* Can be set somewhere, if a SCC master reset has already be done and should + * not be repeated; used by kgdb */ +int atari_SCC_reset_done; +EXPORT_SYMBOL(atari_SCC_reset_done); + +static struct console atari_console_driver = { + .name = "debug", + .flags = CON_PRINTBUFFER, + .index = -1, +}; + + +static inline void ata_mfp_out(char c) +{ + while (!(st_mfp.trn_stat & 0x80)) /* wait for tx buf empty */ + barrier(); + st_mfp.usart_dta = c; +} + +static void atari_mfp_console_write(struct console *co, const char *str, + unsigned int count) +{ + while (count--) { + if (*str == '\n') + ata_mfp_out('\r'); + ata_mfp_out(*str++); + } +} + +static inline void ata_scc_out(char c) +{ + do { + MFPDELAY(); + } while (!(atari_scc.cha_b_ctrl & 0x04)); /* wait for tx buf empty */ + MFPDELAY(); + atari_scc.cha_b_data = c; +} + +static void atari_scc_console_write(struct console *co, const char *str, + unsigned int count) +{ + while (count--) { + if (*str == '\n') + ata_scc_out('\r'); + ata_scc_out(*str++); + } +} + +static inline void ata_midi_out(char c) +{ + while (!(acia.mid_ctrl & ACIA_TDRE)) /* wait for tx buf empty */ + barrier(); + acia.mid_data = c; +} + +static void atari_midi_console_write(struct console *co, const char *str, + unsigned int count) +{ + while (count--) { + if (*str == '\n') + ata_midi_out('\r'); + ata_midi_out(*str++); + } +} + +static int ata_par_out(char c) +{ + unsigned char tmp; + /* This a some-seconds timeout in case no printer is connected */ + unsigned long i = loops_per_jiffy > 1 ? loops_per_jiffy : 10000000/HZ; + + while ((st_mfp.par_dt_reg & 1) && --i) /* wait for BUSY == L */ + ; + if (!i) + return 0; + + sound_ym.rd_data_reg_sel = 15; /* select port B */ + sound_ym.wd_data = c; /* put char onto port */ + sound_ym.rd_data_reg_sel = 14; /* select port A */ + tmp = sound_ym.rd_data_reg_sel; + sound_ym.wd_data = tmp & ~0x20; /* set strobe L */ + MFPDELAY(); /* wait a bit */ + sound_ym.wd_data = tmp | 0x20; /* set strobe H */ + return 1; +} + +static void atari_par_console_write(struct console *co, const char *str, + unsigned int count) +{ + static int printer_present = 1; + + if (!printer_present) + return; + + while (count--) { + if (*str == '\n') { + if (!ata_par_out('\r')) { + printer_present = 0; + return; + } + } + if (!ata_par_out(*str++)) { + printer_present = 0; + return; + } + } +} + +#if 0 +int atari_mfp_console_wait_key(struct console *co) +{ + while (!(st_mfp.rcv_stat & 0x80)) /* wait for rx buf filled */ + barrier(); + return st_mfp.usart_dta; +} + +int atari_scc_console_wait_key(struct console *co) +{ + do { + MFPDELAY(); + } while (!(atari_scc.cha_b_ctrl & 0x01)); /* wait for rx buf filled */ + MFPDELAY(); + return atari_scc.cha_b_data; +} + +int atari_midi_console_wait_key(struct console *co) +{ + while (!(acia.mid_ctrl & ACIA_RDRF)) /* wait for rx buf filled */ + barrier(); + return acia.mid_data; +} +#endif + +/* + * The following two functions do a quick'n'dirty initialization of the MFP or + * SCC serial ports. They're used by the debugging interface, kgdb, and the + * serial console code. + */ +static void __init atari_init_mfp_port(int cflag) +{ + /* + * timer values for 1200...115200 bps; > 38400 select 110, 134, or 150 + * bps, resp., and work only correct if there's a RSVE or RSSPEED + */ + static int baud_table[9] = { 16, 11, 8, 4, 2, 1, 175, 143, 128 }; + int baud = cflag & CBAUD; + int parity = (cflag & PARENB) ? ((cflag & PARODD) ? 0x04 : 0x06) : 0; + int csize = ((cflag & CSIZE) == CS7) ? 0x20 : 0x00; + + if (cflag & CBAUDEX) + baud += B38400; + if (baud < B1200 || baud > B38400+2) + baud = B9600; /* use default 9600bps for non-implemented rates */ + baud -= B1200; /* baud_table[] starts at 1200bps */ + + st_mfp.trn_stat &= ~0x01; /* disable TX */ + st_mfp.usart_ctr = parity | csize | 0x88; /* 1:16 clk mode, 1 stop bit */ + st_mfp.tim_ct_cd &= 0x70; /* stop timer D */ + st_mfp.tim_dt_d = baud_table[baud]; + st_mfp.tim_ct_cd |= 0x01; /* start timer D, 1:4 */ + st_mfp.trn_stat |= 0x01; /* enable TX */ +} + +#define SCC_WRITE(reg, val) \ + do { \ + atari_scc.cha_b_ctrl = (reg); \ + MFPDELAY(); \ + atari_scc.cha_b_ctrl = (val); \ + MFPDELAY(); \ + } while (0) + +/* loops_per_jiffy isn't initialized yet, so we can't use udelay(). This does a + * delay of ~ 60us. */ +#define LONG_DELAY() \ + do { \ + int i; \ + for (i = 100; i > 0; --i) \ + MFPDELAY(); \ + } while (0) + +static void __init atari_init_scc_port(int cflag) +{ + static int clksrc_table[9] = + /* reg 11: 0x50 = BRG, 0x00 = RTxC, 0x28 = TRxC */ + { 0x50, 0x50, 0x50, 0x50, 0x50, 0x50, 0x50, 0x00, 0x00 }; + static int brgsrc_table[9] = + /* reg 14: 0 = RTxC, 2 = PCLK */ + { 2, 2, 2, 2, 2, 2, 0, 2, 2 }; + static int clkmode_table[9] = + /* reg 4: 0x40 = x16, 0x80 = x32, 0xc0 = x64 */ + { 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0xc0, 0x80 }; + static int div_table[9] = + /* reg12 (BRG low) */ + { 208, 138, 103, 50, 24, 11, 1, 0, 0 }; + + int baud = cflag & CBAUD; + int clksrc, clkmode, div, reg3, reg5; + + if (cflag & CBAUDEX) + baud += B38400; + if (baud < B1200 || baud > B38400+2) + baud = B9600; /* use default 9600bps for non-implemented rates */ + baud -= B1200; /* tables starts at 1200bps */ + + clksrc = clksrc_table[baud]; + clkmode = clkmode_table[baud]; + div = div_table[baud]; + if (ATARIHW_PRESENT(TT_MFP) && baud >= 6) { + /* special treatment for TT, where rates >= 38400 are done via TRxC */ + clksrc = 0x28; /* TRxC */ + clkmode = baud == 6 ? 0xc0 : + baud == 7 ? 0x80 : /* really 76800bps */ + 0x40; /* really 153600bps */ + div = 0; + } + + reg3 = (cflag & CSIZE) == CS8 ? 0xc0 : 0x40; + reg5 = (cflag & CSIZE) == CS8 ? 0x60 : 0x20 | 0x82 /* assert DTR/RTS */; + + (void)atari_scc.cha_b_ctrl; /* reset reg pointer */ + SCC_WRITE(9, 0xc0); /* reset */ + LONG_DELAY(); /* extra delay after WR9 access */ + SCC_WRITE(4, (cflag & PARENB) ? ((cflag & PARODD) ? 0x01 : 0x03) + : 0 | 0x04 /* 1 stopbit */ | clkmode); + SCC_WRITE(3, reg3); + SCC_WRITE(5, reg5); + SCC_WRITE(9, 0); /* no interrupts */ + LONG_DELAY(); /* extra delay after WR9 access */ + SCC_WRITE(10, 0); /* NRZ mode */ + SCC_WRITE(11, clksrc); /* main clock source */ + SCC_WRITE(12, div); /* BRG value */ + SCC_WRITE(13, 0); /* BRG high byte */ + SCC_WRITE(14, brgsrc_table[baud]); + SCC_WRITE(14, brgsrc_table[baud] | (div ? 1 : 0)); + SCC_WRITE(3, reg3 | 1); + SCC_WRITE(5, reg5 | 8); + + atari_SCC_reset_done = 1; +} + +static void __init atari_init_midi_port(int cflag) +{ + int baud = cflag & CBAUD; + int csize = ((cflag & CSIZE) == CS8) ? 0x10 : 0x00; + /* warning 7N1 isn't possible! (instead 7O2 is used...) */ + int parity = (cflag & PARENB) ? ((cflag & PARODD) ? 0x0c : 0x08) : 0x04; + int div; + + /* 4800 selects 7812.5, 115200 selects 500000, all other (incl. 9600 as + * default) the standard MIDI speed 31250. */ + if (cflag & CBAUDEX) + baud += B38400; + if (baud == B4800) + div = ACIA_DIV64; /* really 7812.5 bps */ + else if (baud == B38400+2 /* 115200 */) + div = ACIA_DIV1; /* really 500 kbps (does that work??) */ + else + div = ACIA_DIV16; /* 31250 bps, standard for MIDI */ + + /* RTS low, ints disabled */ + acia.mid_ctrl = div | csize | parity | + ((atari_switches & ATARI_SWITCH_MIDI) ? + ACIA_RHTID : ACIA_RLTID); +} + +static int __init atari_debug_setup(char *arg) +{ + bool registered; + + if (!MACH_IS_ATARI) + return 0; + + if (!strcmp(arg, "ser")) + /* defaults to ser2 for a Falcon and ser1 otherwise */ + arg = MACH_IS_FALCON ? "ser2" : "ser1"; + + registered = !!atari_console_driver.write; + if (!strcmp(arg, "ser1")) { + /* ST-MFP Modem1 serial port */ + atari_init_mfp_port(B9600|CS8); + atari_console_driver.write = atari_mfp_console_write; + } else if (!strcmp(arg, "ser2")) { + /* SCC Modem2 serial port */ + atari_init_scc_port(B9600|CS8); + atari_console_driver.write = atari_scc_console_write; + } else if (!strcmp(arg, "midi")) { + /* MIDI port */ + atari_init_midi_port(B9600|CS8); + atari_console_driver.write = atari_midi_console_write; + } else if (!strcmp(arg, "par")) { + /* parallel printer */ + atari_turnoff_irq(IRQ_MFP_BUSY); /* avoid ints */ + sound_ym.rd_data_reg_sel = 7; /* select mixer control */ + sound_ym.wd_data = 0xff; /* sound off, ports are output */ + sound_ym.rd_data_reg_sel = 15; /* select port B */ + sound_ym.wd_data = 0; /* no char */ + sound_ym.rd_data_reg_sel = 14; /* select port A */ + sound_ym.wd_data = sound_ym.rd_data_reg_sel | 0x20; /* strobe H */ + atari_console_driver.write = atari_par_console_write; + } + if (atari_console_driver.write && !registered) + register_console(&atari_console_driver); + + return 0; +} + +early_param("debug", atari_debug_setup); diff --git a/arch/m68k/atari/nvram.c b/arch/m68k/atari/nvram.c new file mode 100644 index 000000000..7000d2443 --- /dev/null +++ b/arch/m68k/atari/nvram.c @@ -0,0 +1,272 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * CMOS/NV-RAM driver for Atari. Adapted from drivers/char/nvram.c. + * Copyright (C) 1997 Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de> + * idea by and with help from Richard Jelinek <rj@suse.de> + * Portions copyright (c) 2001,2002 Sun Microsystems (thockin@sun.com) + * Further contributions from Cesar Barros, Erik Gilling, Tim Hockin and + * Wim Van Sebroeck. + */ + +#include <linux/errno.h> +#include <linux/init.h> +#include <linux/mc146818rtc.h> +#include <linux/module.h> +#include <linux/nvram.h> +#include <linux/proc_fs.h> +#include <linux/seq_file.h> +#include <linux/spinlock.h> +#include <linux/types.h> +#include <asm/atarihw.h> +#include <asm/atariints.h> + +#define NVRAM_BYTES 50 + +/* It is worth noting that these functions all access bytes of general + * purpose memory in the NVRAM - that is to say, they all add the + * NVRAM_FIRST_BYTE offset. Pass them offsets into NVRAM as if you did not + * know about the RTC cruft. + */ + +/* Note that *all* calls to CMOS_READ and CMOS_WRITE must be done with + * rtc_lock held. Due to the index-port/data-port design of the RTC, we + * don't want two different things trying to get to it at once. (e.g. the + * periodic 11 min sync from kernel/time/ntp.c vs. this driver.) + */ + +static unsigned char __nvram_read_byte(int i) +{ + return CMOS_READ(NVRAM_FIRST_BYTE + i); +} + +/* This races nicely with trying to read with checksum checking */ +static void __nvram_write_byte(unsigned char c, int i) +{ + CMOS_WRITE(c, NVRAM_FIRST_BYTE + i); +} + +/* On Ataris, the checksum is over all bytes except the checksum bytes + * themselves; these are at the very end. + */ +#define ATARI_CKS_RANGE_START 0 +#define ATARI_CKS_RANGE_END 47 +#define ATARI_CKS_LOC 48 + +static int __nvram_check_checksum(void) +{ + int i; + unsigned char sum = 0; + + for (i = ATARI_CKS_RANGE_START; i <= ATARI_CKS_RANGE_END; ++i) + sum += __nvram_read_byte(i); + return (__nvram_read_byte(ATARI_CKS_LOC) == (~sum & 0xff)) && + (__nvram_read_byte(ATARI_CKS_LOC + 1) == (sum & 0xff)); +} + +static void __nvram_set_checksum(void) +{ + int i; + unsigned char sum = 0; + + for (i = ATARI_CKS_RANGE_START; i <= ATARI_CKS_RANGE_END; ++i) + sum += __nvram_read_byte(i); + __nvram_write_byte(~sum, ATARI_CKS_LOC); + __nvram_write_byte(sum, ATARI_CKS_LOC + 1); +} + +long atari_nvram_set_checksum(void) +{ + spin_lock_irq(&rtc_lock); + __nvram_set_checksum(); + spin_unlock_irq(&rtc_lock); + return 0; +} + +long atari_nvram_initialize(void) +{ + loff_t i; + + spin_lock_irq(&rtc_lock); + for (i = 0; i < NVRAM_BYTES; ++i) + __nvram_write_byte(0, i); + __nvram_set_checksum(); + spin_unlock_irq(&rtc_lock); + return 0; +} + +ssize_t atari_nvram_read(char *buf, size_t count, loff_t *ppos) +{ + char *p = buf; + loff_t i; + + spin_lock_irq(&rtc_lock); + if (!__nvram_check_checksum()) { + spin_unlock_irq(&rtc_lock); + return -EIO; + } + for (i = *ppos; count > 0 && i < NVRAM_BYTES; --count, ++i, ++p) + *p = __nvram_read_byte(i); + spin_unlock_irq(&rtc_lock); + + *ppos = i; + return p - buf; +} + +ssize_t atari_nvram_write(char *buf, size_t count, loff_t *ppos) +{ + char *p = buf; + loff_t i; + + spin_lock_irq(&rtc_lock); + if (!__nvram_check_checksum()) { + spin_unlock_irq(&rtc_lock); + return -EIO; + } + for (i = *ppos; count > 0 && i < NVRAM_BYTES; --count, ++i, ++p) + __nvram_write_byte(*p, i); + __nvram_set_checksum(); + spin_unlock_irq(&rtc_lock); + + *ppos = i; + return p - buf; +} + +ssize_t atari_nvram_get_size(void) +{ + return NVRAM_BYTES; +} + +#ifdef CONFIG_PROC_FS +static struct { + unsigned char val; + const char *name; +} boot_prefs[] = { + { 0x80, "TOS" }, + { 0x40, "ASV" }, + { 0x20, "NetBSD (?)" }, + { 0x10, "Linux" }, + { 0x00, "unspecified" }, +}; + +static const char * const languages[] = { + "English (US)", + "German", + "French", + "English (UK)", + "Spanish", + "Italian", + "6 (undefined)", + "Swiss (French)", + "Swiss (German)", +}; + +static const char * const dateformat[] = { + "MM%cDD%cYY", + "DD%cMM%cYY", + "YY%cMM%cDD", + "YY%cDD%cMM", + "4 (undefined)", + "5 (undefined)", + "6 (undefined)", + "7 (undefined)", +}; + +static const char * const colors[] = { + "2", "4", "16", "256", "65536", "??", "??", "??" +}; + +static void atari_nvram_proc_read(unsigned char *nvram, struct seq_file *seq, + void *offset) +{ + int checksum; + int i; + unsigned int vmode; + + spin_lock_irq(&rtc_lock); + checksum = __nvram_check_checksum(); + spin_unlock_irq(&rtc_lock); + + seq_printf(seq, "Checksum status : %svalid\n", checksum ? "" : "not "); + + seq_puts(seq, "Boot preference : "); + for (i = ARRAY_SIZE(boot_prefs) - 1; i >= 0; --i) + if (nvram[1] == boot_prefs[i].val) { + seq_printf(seq, "%s\n", boot_prefs[i].name); + break; + } + if (i < 0) + seq_printf(seq, "0x%02x (undefined)\n", nvram[1]); + + seq_printf(seq, "SCSI arbitration : %s\n", + (nvram[16] & 0x80) ? "on" : "off"); + seq_puts(seq, "SCSI host ID : "); + if (nvram[16] & 0x80) + seq_printf(seq, "%d\n", nvram[16] & 7); + else + seq_puts(seq, "n/a\n"); + + if (!MACH_IS_FALCON) + return; + + seq_puts(seq, "OS language : "); + if (nvram[6] < ARRAY_SIZE(languages)) + seq_printf(seq, "%s\n", languages[nvram[6]]); + else + seq_printf(seq, "%u (undefined)\n", nvram[6]); + seq_puts(seq, "Keyboard language: "); + if (nvram[7] < ARRAY_SIZE(languages)) + seq_printf(seq, "%s\n", languages[nvram[7]]); + else + seq_printf(seq, "%u (undefined)\n", nvram[7]); + seq_puts(seq, "Date format : "); + seq_printf(seq, dateformat[nvram[8] & 7], + nvram[9] ? nvram[9] : '/', nvram[9] ? nvram[9] : '/'); + seq_printf(seq, ", %dh clock\n", nvram[8] & 16 ? 24 : 12); + seq_puts(seq, "Boot delay : "); + if (nvram[10] == 0) + seq_puts(seq, "default\n"); + else + seq_printf(seq, "%ds%s\n", nvram[10], + nvram[10] < 8 ? ", no memory test" : ""); + + vmode = (nvram[14] << 8) | nvram[15]; + seq_printf(seq, + "Video mode : %s colors, %d columns, %s %s monitor\n", + colors[vmode & 7], vmode & 8 ? 80 : 40, + vmode & 16 ? "VGA" : "TV", vmode & 32 ? "PAL" : "NTSC"); + seq_printf(seq, + " %soverscan, compat. mode %s%s\n", + vmode & 64 ? "" : "no ", vmode & 128 ? "on" : "off", + vmode & 256 ? + (vmode & 16 ? ", line doubling" : ", half screen") : ""); +} + +static int nvram_proc_read(struct seq_file *seq, void *offset) +{ + unsigned char contents[NVRAM_BYTES]; + int i; + + spin_lock_irq(&rtc_lock); + for (i = 0; i < NVRAM_BYTES; ++i) + contents[i] = __nvram_read_byte(i); + spin_unlock_irq(&rtc_lock); + + atari_nvram_proc_read(contents, seq, offset); + + return 0; +} + +static int __init atari_nvram_init(void) +{ + if (!(MACH_IS_ATARI && ATARIHW_PRESENT(TT_CLK))) + return -ENODEV; + + if (!proc_create_single("driver/nvram", 0, NULL, nvram_proc_read)) { + pr_err("nvram: can't create /proc/driver/nvram\n"); + return -ENOMEM; + } + + return 0; +} +device_initcall(atari_nvram_init); +#endif /* CONFIG_PROC_FS */ diff --git a/arch/m68k/atari/stdma.c b/arch/m68k/atari/stdma.c new file mode 100644 index 000000000..ce6818eff --- /dev/null +++ b/arch/m68k/atari/stdma.c @@ -0,0 +1,219 @@ +/* + * linux/arch/m68k/atari/stmda.c + * + * Copyright (C) 1994 Roman Hodek + * + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file COPYING in the main directory of this archive + * for more details. + */ + + +/* This file contains some function for controlling the access to the */ +/* ST-DMA chip that may be shared between devices. Currently we have: */ +/* TT: Floppy and ACSI bus */ +/* Falcon: Floppy and SCSI */ +/* */ +/* The controlling functions set up a wait queue for access to the */ +/* ST-DMA chip. Callers to stdma_lock() that cannot granted access are */ +/* put onto a queue and waked up later if the owner calls */ +/* stdma_release(). Additionally, the caller gives his interrupt */ +/* service routine to stdma_lock(). */ +/* */ +/* On the Falcon, the IDE bus uses just the ACSI/Floppy interrupt, but */ +/* not the ST-DMA chip itself. So falhd.c needs not to lock the */ +/* chip. The interrupt is routed to falhd.c if IDE is configured, the */ +/* model is a Falcon and the interrupt was caused by the HD controller */ +/* (can be determined by looking at its status register). */ + + +#include <linux/types.h> +#include <linux/kdev_t.h> +#include <linux/sched.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/wait.h> +#include <linux/module.h> + +#include <asm/atari_stdma.h> +#include <asm/atariints.h> +#include <asm/atarihw.h> +#include <asm/io.h> +#include <asm/irq.h> + +static int stdma_locked; /* the semaphore */ + /* int func to be called */ +static irq_handler_t stdma_isr; +static void *stdma_isr_data; /* data passed to isr */ +static DECLARE_WAIT_QUEUE_HEAD(stdma_wait); /* wait queue for ST-DMA */ + + + + +/***************************** Prototypes *****************************/ + +static irqreturn_t stdma_int (int irq, void *dummy); + +/************************* End of Prototypes **************************/ + + +/** + * stdma_try_lock - attempt to acquire ST DMA interrupt "lock" + * @handler: interrupt handler to use after acquisition + * + * Returns !0 if lock was acquired; otherwise 0. + */ + +int stdma_try_lock(irq_handler_t handler, void *data) +{ + unsigned long flags; + + local_irq_save(flags); + if (stdma_locked) { + local_irq_restore(flags); + return 0; + } + + stdma_locked = 1; + stdma_isr = handler; + stdma_isr_data = data; + local_irq_restore(flags); + return 1; +} +EXPORT_SYMBOL(stdma_try_lock); + + +/* + * Function: void stdma_lock( isrfunc isr, void *data ) + * + * Purpose: Tries to get a lock on the ST-DMA chip that is used by more + * then one device driver. Waits on stdma_wait until lock is free. + * stdma_lock() may not be called from an interrupt! You have to + * get the lock in your main routine and release it when your + * request is finished. + * + * Inputs: A interrupt function that is called until the lock is + * released. + * + * Returns: nothing + * + */ + +void stdma_lock(irq_handler_t handler, void *data) +{ + /* Since the DMA is used for file system purposes, we + have to sleep uninterruptible (there may be locked + buffers) */ + wait_event(stdma_wait, stdma_try_lock(handler, data)); +} +EXPORT_SYMBOL(stdma_lock); + + +/* + * Function: void stdma_release( void ) + * + * Purpose: Releases the lock on the ST-DMA chip. + * + * Inputs: none + * + * Returns: nothing + * + */ + +void stdma_release(void) +{ + unsigned long flags; + + local_irq_save(flags); + + stdma_locked = 0; + stdma_isr = NULL; + stdma_isr_data = NULL; + wake_up(&stdma_wait); + + local_irq_restore(flags); +} +EXPORT_SYMBOL(stdma_release); + + +/** + * stdma_is_locked_by - allow lock holder to check whether it needs to release. + * @handler: interrupt handler previously used to acquire lock. + * + * Returns !0 if locked for the given handler; 0 otherwise. + */ + +int stdma_is_locked_by(irq_handler_t handler) +{ + unsigned long flags; + int result; + + local_irq_save(flags); + result = stdma_locked && (stdma_isr == handler); + local_irq_restore(flags); + + return result; +} +EXPORT_SYMBOL(stdma_is_locked_by); + + +/* + * Function: int stdma_islocked( void ) + * + * Purpose: Check if the ST-DMA is currently locked. + * Note: Returned status is only valid if ints are disabled while calling and + * as long as they remain disabled. + * If called with ints enabled, status can change only from locked to + * unlocked, because ints may not lock the ST-DMA. + * + * Inputs: none + * + * Returns: != 0 if locked, 0 otherwise + * + */ + +int stdma_islocked(void) +{ + return stdma_locked; +} +EXPORT_SYMBOL(stdma_islocked); + + +/* + * Function: void stdma_init( void ) + * + * Purpose: Initialize the ST-DMA chip access controlling. + * It sets up the interrupt and its service routine. The int is registered + * as slow int, client devices have to live with that (no problem + * currently). + * + * Inputs: none + * + * Return: nothing + * + */ + +void __init stdma_init(void) +{ + stdma_isr = NULL; + if (request_irq(IRQ_MFP_FDC, stdma_int, IRQF_SHARED, + "ST-DMA floppy,ACSI,IDE,Falcon-SCSI", stdma_int)) + pr_err("Couldn't register ST-DMA interrupt\n"); +} + + +/* + * Function: void stdma_int() + * + * Purpose: The interrupt routine for the ST-DMA. It calls the isr + * registered by stdma_lock(). + * + */ + +static irqreturn_t stdma_int(int irq, void *dummy) +{ + if (stdma_isr) + (*stdma_isr)(irq, stdma_isr_data); + return IRQ_HANDLED; +} diff --git a/arch/m68k/atari/stram.c b/arch/m68k/atari/stram.c new file mode 100644 index 000000000..ce79b322a --- /dev/null +++ b/arch/m68k/atari/stram.c @@ -0,0 +1,202 @@ +/* + * Functions for ST-RAM allocations + * + * Copyright 1994-97 Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de> + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file COPYING in the main directory of this archive + * for more details. + */ + +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/mm.h> +#include <linux/kdev_t.h> +#include <linux/major.h> +#include <linux/init.h> +#include <linux/slab.h> +#include <linux/vmalloc.h> +#include <linux/pagemap.h> +#include <linux/memblock.h> +#include <linux/mount.h> +#include <linux/blkdev.h> +#include <linux/module.h> +#include <linux/ioport.h> + +#include <asm/setup.h> +#include <asm/machdep.h> +#include <asm/page.h> +#include <asm/atarihw.h> +#include <asm/atari_stram.h> +#include <asm/io.h> + + +/* + * The ST-RAM allocator allocates memory from a pool of reserved ST-RAM of + * configurable size, set aside on ST-RAM init. + * As long as this pool is not exhausted, allocation of real ST-RAM can be + * guaranteed. + */ + +/* set if kernel is in ST-RAM */ +static int kernel_in_stram; + +static struct resource stram_pool = { + .name = "ST-RAM Pool" +}; + +static unsigned long pool_size = 1024*1024; + +static unsigned long stram_virt_offset; + +static int __init atari_stram_setup(char *arg) +{ + if (!MACH_IS_ATARI) + return 0; + + pool_size = memparse(arg, NULL); + return 0; +} + +early_param("stram_pool", atari_stram_setup); + + +/* + * This init function is called very early by atari/config.c + * It initializes some internal variables needed for stram_alloc() + */ +void __init atari_stram_init(void) +{ + int i; + + /* + * determine whether kernel code resides in ST-RAM + * (then ST-RAM is the first memory block at virtual 0x0) + */ + kernel_in_stram = (m68k_memory[0].addr == 0); + + for (i = 0; i < m68k_num_memory; ++i) { + if (m68k_memory[i].addr == 0) { + return; + } + } + + /* Should never come here! (There is always ST-Ram!) */ + panic("atari_stram_init: no ST-RAM found!"); +} + + +/* + * This function is called from setup_arch() to reserve the pages needed for + * ST-RAM management, if the kernel resides in ST-RAM. + */ +void __init atari_stram_reserve_pages(void *start_mem) +{ + if (kernel_in_stram) { + pr_debug("atari_stram pool: kernel in ST-RAM, using alloc_bootmem!\n"); + stram_pool.start = (resource_size_t)memblock_alloc_low(pool_size, + PAGE_SIZE); + if (!stram_pool.start) + panic("%s: Failed to allocate %lu bytes align=%lx\n", + __func__, pool_size, PAGE_SIZE); + + stram_pool.end = stram_pool.start + pool_size - 1; + request_resource(&iomem_resource, &stram_pool); + stram_virt_offset = 0; + pr_debug("atari_stram pool: size = %lu bytes, resource = %pR\n", + pool_size, &stram_pool); + pr_debug("atari_stram pool: stram_virt_offset = %lx\n", + stram_virt_offset); + } +} + + +/* + * This function is called as arch initcall to reserve the pages needed for + * ST-RAM management, if the kernel does not reside in ST-RAM. + */ +int __init atari_stram_map_pages(void) +{ + if (!kernel_in_stram) { + /* + * Skip page 0, as the fhe first 2 KiB are supervisor-only! + */ + pr_debug("atari_stram pool: kernel not in ST-RAM, using ioremap!\n"); + stram_pool.start = PAGE_SIZE; + stram_pool.end = stram_pool.start + pool_size - 1; + request_resource(&iomem_resource, &stram_pool); + stram_virt_offset = (unsigned long) ioremap(stram_pool.start, + resource_size(&stram_pool)) - stram_pool.start; + pr_debug("atari_stram pool: size = %lu bytes, resource = %pR\n", + pool_size, &stram_pool); + pr_debug("atari_stram pool: stram_virt_offset = %lx\n", + stram_virt_offset); + } + return 0; +} +arch_initcall(atari_stram_map_pages); + + +void *atari_stram_to_virt(unsigned long phys) +{ + return (void *)(phys + stram_virt_offset); +} +EXPORT_SYMBOL(atari_stram_to_virt); + + +unsigned long atari_stram_to_phys(void *virt) +{ + return (unsigned long)(virt - stram_virt_offset); +} +EXPORT_SYMBOL(atari_stram_to_phys); + + +void *atari_stram_alloc(unsigned long size, const char *owner) +{ + struct resource *res; + int error; + + pr_debug("atari_stram_alloc: allocate %lu bytes\n", size); + + /* round up */ + size = PAGE_ALIGN(size); + + res = kzalloc(sizeof(struct resource), GFP_KERNEL); + if (!res) + return NULL; + + res->name = owner; + error = allocate_resource(&stram_pool, res, size, 0, UINT_MAX, + PAGE_SIZE, NULL, NULL); + if (error < 0) { + pr_err("atari_stram_alloc: allocate_resource() failed %d!\n", + error); + kfree(res); + return NULL; + } + + pr_debug("atari_stram_alloc: returning %pR\n", res); + return atari_stram_to_virt(res->start); +} +EXPORT_SYMBOL(atari_stram_alloc); + + +void atari_stram_free(void *addr) +{ + unsigned long start = atari_stram_to_phys(addr); + struct resource *res; + unsigned long size; + + res = lookup_resource(&stram_pool, start); + if (!res) { + pr_err("atari_stram_free: trying to free nonexistent region " + "at %p\n", addr); + return; + } + + size = resource_size(res); + pr_debug("atari_stram_free: free %lu bytes at %p\n", size, addr); + release_resource(res); + kfree(res); +} +EXPORT_SYMBOL(atari_stram_free); diff --git a/arch/m68k/atari/time.c b/arch/m68k/atari/time.c new file mode 100644 index 000000000..7e44d0e9d --- /dev/null +++ b/arch/m68k/atari/time.c @@ -0,0 +1,319 @@ +/* + * linux/arch/m68k/atari/time.c + * + * Atari time and real time clock stuff + * + * Assembled of parts of former atari/config.c 97-12-18 by Roman Hodek + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file COPYING in the main directory of this archive + * for more details. + */ + +#include <linux/types.h> +#include <linux/mc146818rtc.h> +#include <linux/interrupt.h> +#include <linux/init.h> +#include <linux/rtc.h> +#include <linux/bcd.h> +#include <linux/clocksource.h> +#include <linux/delay.h> +#include <linux/export.h> + +#include <asm/atariints.h> +#include <asm/machdep.h> + +DEFINE_SPINLOCK(rtc_lock); +EXPORT_SYMBOL_GPL(rtc_lock); + +static u64 atari_read_clk(struct clocksource *cs); + +static struct clocksource atari_clk = { + .name = "mfp", + .rating = 100, + .read = atari_read_clk, + .mask = CLOCKSOURCE_MASK(32), + .flags = CLOCK_SOURCE_IS_CONTINUOUS, +}; + +static u32 clk_total; +static u8 last_timer_count; + +static irqreturn_t mfp_timer_c_handler(int irq, void *dev_id) +{ + unsigned long flags; + + local_irq_save(flags); + do { + last_timer_count = st_mfp.tim_dt_c; + } while (last_timer_count == 1); + clk_total += INT_TICKS; + legacy_timer_tick(1); + timer_heartbeat(); + local_irq_restore(flags); + + return IRQ_HANDLED; +} + +void __init +atari_sched_init(void) +{ + /* set Timer C data Register */ + st_mfp.tim_dt_c = INT_TICKS; + /* start timer C, div = 1:100 */ + st_mfp.tim_ct_cd = (st_mfp.tim_ct_cd & 15) | 0x60; + /* install interrupt service routine for MFP Timer C */ + if (request_irq(IRQ_MFP_TIMC, mfp_timer_c_handler, IRQF_TIMER, "timer", + NULL)) + pr_err("Couldn't register timer interrupt\n"); + + clocksource_register_hz(&atari_clk, INT_CLK); +} + +/* ++andreas: gettimeoffset fixed to check for pending interrupt */ + +static u64 atari_read_clk(struct clocksource *cs) +{ + unsigned long flags; + u8 count; + u32 ticks; + + local_irq_save(flags); + /* Ensure that the count is monotonically decreasing, even though + * the result may briefly stop changing after counter wrap-around. + */ + count = min(st_mfp.tim_dt_c, last_timer_count); + last_timer_count = count; + + ticks = INT_TICKS - count; + ticks += clk_total; + local_irq_restore(flags); + + return ticks; +} + + +static void mste_read(struct MSTE_RTC *val) +{ +#define COPY(v) val->v=(mste_rtc.v & 0xf) + do { + COPY(sec_ones) ; COPY(sec_tens) ; COPY(min_ones) ; + COPY(min_tens) ; COPY(hr_ones) ; COPY(hr_tens) ; + COPY(weekday) ; COPY(day_ones) ; COPY(day_tens) ; + COPY(mon_ones) ; COPY(mon_tens) ; COPY(year_ones) ; + COPY(year_tens) ; + /* prevent from reading the clock while it changed */ + } while (val->sec_ones != (mste_rtc.sec_ones & 0xf)); +#undef COPY +} + +static void mste_write(struct MSTE_RTC *val) +{ +#define COPY(v) mste_rtc.v=val->v + do { + COPY(sec_ones) ; COPY(sec_tens) ; COPY(min_ones) ; + COPY(min_tens) ; COPY(hr_ones) ; COPY(hr_tens) ; + COPY(weekday) ; COPY(day_ones) ; COPY(day_tens) ; + COPY(mon_ones) ; COPY(mon_tens) ; COPY(year_ones) ; + COPY(year_tens) ; + /* prevent from writing the clock while it changed */ + } while (val->sec_ones != (mste_rtc.sec_ones & 0xf)); +#undef COPY +} + +#define RTC_READ(reg) \ + ({ unsigned char __val; \ + (void) atari_writeb(reg,&tt_rtc.regsel); \ + __val = tt_rtc.data; \ + __val; \ + }) + +#define RTC_WRITE(reg,val) \ + do { \ + atari_writeb(reg,&tt_rtc.regsel); \ + tt_rtc.data = (val); \ + } while(0) + + +#define HWCLK_POLL_INTERVAL 5 + +int atari_mste_hwclk( int op, struct rtc_time *t ) +{ + int hour, year; + int hr24=0; + struct MSTE_RTC val; + + mste_rtc.mode=(mste_rtc.mode | 1); + hr24=mste_rtc.mon_tens & 1; + mste_rtc.mode=(mste_rtc.mode & ~1); + + if (op) { + /* write: prepare values */ + + val.sec_ones = t->tm_sec % 10; + val.sec_tens = t->tm_sec / 10; + val.min_ones = t->tm_min % 10; + val.min_tens = t->tm_min / 10; + hour = t->tm_hour; + if (!hr24) { + if (hour > 11) + hour += 20 - 12; + if (hour == 0 || hour == 20) + hour += 12; + } + val.hr_ones = hour % 10; + val.hr_tens = hour / 10; + val.day_ones = t->tm_mday % 10; + val.day_tens = t->tm_mday / 10; + val.mon_ones = (t->tm_mon+1) % 10; + val.mon_tens = (t->tm_mon+1) / 10; + year = t->tm_year - 80; + val.year_ones = year % 10; + val.year_tens = year / 10; + val.weekday = t->tm_wday; + mste_write(&val); + mste_rtc.mode=(mste_rtc.mode | 1); + val.year_ones = (year % 4); /* leap year register */ + mste_rtc.mode=(mste_rtc.mode & ~1); + } + else { + mste_read(&val); + t->tm_sec = val.sec_ones + val.sec_tens * 10; + t->tm_min = val.min_ones + val.min_tens * 10; + hour = val.hr_ones + val.hr_tens * 10; + if (!hr24) { + if (hour == 12 || hour == 12 + 20) + hour -= 12; + if (hour >= 20) + hour += 12 - 20; + } + t->tm_hour = hour; + t->tm_mday = val.day_ones + val.day_tens * 10; + t->tm_mon = val.mon_ones + val.mon_tens * 10 - 1; + t->tm_year = val.year_ones + val.year_tens * 10 + 80; + t->tm_wday = val.weekday; + } + return 0; +} + +int atari_tt_hwclk( int op, struct rtc_time *t ) +{ + int sec=0, min=0, hour=0, day=0, mon=0, year=0, wday=0; + unsigned long flags; + unsigned char ctrl; + int pm = 0; + + ctrl = RTC_READ(RTC_CONTROL); /* control registers are + * independent from the UIP */ + + if (op) { + /* write: prepare values */ + + sec = t->tm_sec; + min = t->tm_min; + hour = t->tm_hour; + day = t->tm_mday; + mon = t->tm_mon + 1; + year = t->tm_year - atari_rtc_year_offset; + wday = t->tm_wday + (t->tm_wday >= 0); + + if (!(ctrl & RTC_24H)) { + if (hour > 11) { + pm = 0x80; + if (hour != 12) + hour -= 12; + } + else if (hour == 0) + hour = 12; + } + + if (!(ctrl & RTC_DM_BINARY)) { + sec = bin2bcd(sec); + min = bin2bcd(min); + hour = bin2bcd(hour); + day = bin2bcd(day); + mon = bin2bcd(mon); + year = bin2bcd(year); + if (wday >= 0) + wday = bin2bcd(wday); + } + } + + /* Reading/writing the clock registers is a bit critical due to + * the regular update cycle of the RTC. While an update is in + * progress, registers 0..9 shouldn't be touched. + * The problem is solved like that: If an update is currently in + * progress (the UIP bit is set), the process sleeps for a while + * (50ms). This really should be enough, since the update cycle + * normally needs 2 ms. + * If the UIP bit reads as 0, we have at least 244 usecs until the + * update starts. This should be enough... But to be sure, + * additionally the RTC_SET bit is set to prevent an update cycle. + */ + + while( RTC_READ(RTC_FREQ_SELECT) & RTC_UIP ) { + if (in_atomic() || irqs_disabled()) + mdelay(1); + else + schedule_timeout_interruptible(HWCLK_POLL_INTERVAL); + } + + local_irq_save(flags); + RTC_WRITE( RTC_CONTROL, ctrl | RTC_SET ); + if (!op) { + sec = RTC_READ( RTC_SECONDS ); + min = RTC_READ( RTC_MINUTES ); + hour = RTC_READ( RTC_HOURS ); + day = RTC_READ( RTC_DAY_OF_MONTH ); + mon = RTC_READ( RTC_MONTH ); + year = RTC_READ( RTC_YEAR ); + wday = RTC_READ( RTC_DAY_OF_WEEK ); + } + else { + RTC_WRITE( RTC_SECONDS, sec ); + RTC_WRITE( RTC_MINUTES, min ); + RTC_WRITE( RTC_HOURS, hour + pm); + RTC_WRITE( RTC_DAY_OF_MONTH, day ); + RTC_WRITE( RTC_MONTH, mon ); + RTC_WRITE( RTC_YEAR, year ); + if (wday >= 0) RTC_WRITE( RTC_DAY_OF_WEEK, wday ); + } + RTC_WRITE( RTC_CONTROL, ctrl & ~RTC_SET ); + local_irq_restore(flags); + + if (!op) { + /* read: adjust values */ + + if (hour & 0x80) { + hour &= ~0x80; + pm = 1; + } + + if (!(ctrl & RTC_DM_BINARY)) { + sec = bcd2bin(sec); + min = bcd2bin(min); + hour = bcd2bin(hour); + day = bcd2bin(day); + mon = bcd2bin(mon); + year = bcd2bin(year); + wday = bcd2bin(wday); + } + + if (!(ctrl & RTC_24H)) { + if (!pm && hour == 12) + hour = 0; + else if (pm && hour != 12) + hour += 12; + } + + t->tm_sec = sec; + t->tm_min = min; + t->tm_hour = hour; + t->tm_mday = day; + t->tm_mon = mon - 1; + t->tm_year = year + atari_rtc_year_offset; + t->tm_wday = wday - 1; + } + + return( 0 ); +} |