diff options
Diffstat (limited to 'drivers/ata/pata_parport/fit3.c')
| -rw-r--r-- | drivers/ata/pata_parport/fit3.c | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/drivers/ata/pata_parport/fit3.c b/drivers/ata/pata_parport/fit3.c new file mode 100644 index 0000000000..d2b81cf2e1 --- /dev/null +++ b/drivers/ata/pata_parport/fit3.c @@ -0,0 +1,189 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * (c) 1998 Grant R. Guenther <grant@torque.net> + * + * fit3.c is a low-level protocol driver for newer models + * of the Fidelity International Technology parallel port adapter. + * This adapter is used in their TransDisk 3000 portable + * hard-drives, as well as CD-ROM, PD-CD and other devices. + * + * The TD-2000 and certain older devices use a different protocol. + * Try the fit2 protocol module with them. + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/delay.h> +#include <linux/kernel.h> +#include <linux/types.h> +#include <linux/wait.h> +#include <asm/io.h> +#include "pata_parport.h" + +#define j44(a, b) (((a >> 3) & 0x0f) | ((b << 1) & 0xf0)) + +#define w7(byte) out_p(7, byte) +#define r7() (in_p(7) & 0xff) + +/* + * cont = 0 - access the IDE register file + * cont = 1 - access the IDE command set + */ + +static void fit3_write_regr(struct pi_adapter *pi, int cont, int regr, int val) +{ + regr += cont << 3; + + switch (pi->mode) { + case 0: + case 1: + w2(0xc); w0(regr); w2(0x8); w2(0xc); + w0(val); w2(0xd); + w0(0); w2(0xc); + break; + case 2: + w2(0xc); w0(regr); w2(0x8); w2(0xc); + w4(val); w4(0); + w2(0xc); + break; + } +} + +static int fit3_read_regr(struct pi_adapter *pi, int cont, int regr) +{ + int a, b; + + regr += cont << 3; + + switch (pi->mode) { + case 0: + w2(0xc); w0(regr + 0x10); w2(0x8); w2(0xc); + w2(0xd); a = r1(); + w2(0xf); b = r1(); + w2(0xc); + return j44(a, b); + case 1: + w2(0xc); w0(regr + 0x90); w2(0x8); w2(0xc); + w2(0xec); w2(0xee); w2(0xef); a = r0(); + w2(0xc); + return a; + case 2: + w2(0xc); w0(regr + 0x90); w2(0x8); w2(0xc); + w2(0xec); + a = r4(); b = r4(); + w2(0xc); + return a; + } + + return -1; +} + +static void fit3_read_block(struct pi_adapter *pi, char *buf, int count) +{ + int k, a, b, c, d; + + switch (pi->mode) { + case 0: + w2(0xc); w0(0x10); w2(0x8); w2(0xc); + for (k = 0; k < count / 2; k++) { + w2(0xd); a = r1(); + w2(0xf); b = r1(); + w2(0xc); c = r1(); + w2(0xe); d = r1(); + buf[2 * k] = j44(a, b); + buf[2 * k + 1] = j44(c, d); + } + w2(0xc); + break; + case 1: + w2(0xc); w0(0x90); w2(0x8); w2(0xc); + w2(0xec); w2(0xee); + for (k = 0; k < count / 2; k++) { + w2(0xef); a = r0(); + w2(0xee); b = r0(); + buf[2 * k] = a; + buf[2 * k + 1] = b; + } + w2(0xec); + w2(0xc); + break; + case 2: + w2(0xc); w0(0x90); w2(0x8); w2(0xc); + w2(0xec); + for (k = 0; k < count; k++) + buf[k] = r4(); + w2(0xc); + break; + } +} + +static void fit3_write_block(struct pi_adapter *pi, char *buf, int count) +{ + int k; + + switch (pi->mode) { + case 0: + case 1: + w2(0xc); w0(0); w2(0x8); w2(0xc); + for (k = 0; k < count / 2; k++) { + w0(buf[2 * k]); w2(0xd); + w0(buf[2 * k + 1]); w2(0xc); + } + break; + case 2: + w2(0xc); w0(0); w2(0x8); w2(0xc); + for (k = 0; k < count; k++) + w4(buf[k]); + w2(0xc); + break; + } +} + +static void fit3_connect(struct pi_adapter *pi) +{ + pi->saved_r0 = r0(); + pi->saved_r2 = r2(); + w2(0xc); w0(0); w2(0xa); + if (pi->mode == 2) { + w2(0xc); w0(0x9); + w2(0x8); w2(0xc); + } +} + +static void fit3_disconnect(struct pi_adapter *pi) +{ + w2(0xc); w0(0xa); w2(0x8); w2(0xc); + w0(pi->saved_r0); + w2(pi->saved_r2); +} + +static void fit3_log_adapter(struct pi_adapter *pi) +{ + char *mode_string[3] = { "4-bit", "8-bit", "EPP"}; + + dev_info(&pi->dev, + "FIT 3000 adapter at 0x%x, mode %d (%s), delay %d\n", + pi->port, pi->mode, mode_string[pi->mode], pi->delay); +} + +static struct pi_protocol fit3 = { + .owner = THIS_MODULE, + .name = "fit3", + .max_mode = 3, + .epp_first = 2, + .default_delay = 1, + .max_units = 1, + .write_regr = fit3_write_regr, + .read_regr = fit3_read_regr, + .write_block = fit3_write_block, + .read_block = fit3_read_block, + .connect = fit3_connect, + .disconnect = fit3_disconnect, + .log_adapter = fit3_log_adapter, +}; + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Grant R. Guenther <grant@torque.net>"); +MODULE_DESCRIPTION("Fidelity International Technology parallel port IDE adapter" + "(newer models) protocol driver"); +module_pata_parport_driver(fit3); |