diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/video/fbdev/uvesafb.c | 2005 |
1 files changed, 2005 insertions, 0 deletions
diff --git a/drivers/video/fbdev/uvesafb.c b/drivers/video/fbdev/uvesafb.c new file mode 100644 index 000000000..d999a7cdb --- /dev/null +++ b/drivers/video/fbdev/uvesafb.c @@ -0,0 +1,2005 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * A framebuffer driver for VBE 2.0+ compliant video cards + * + * (c) 2007 Michal Januszewski <spock@gentoo.org> + * Loosely based upon the vesafb driver. + * + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/init.h> +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/skbuff.h> +#include <linux/timer.h> +#include <linux/completion.h> +#include <linux/connector.h> +#include <linux/random.h> +#include <linux/platform_device.h> +#include <linux/limits.h> +#include <linux/fb.h> +#include <linux/io.h> +#include <linux/mutex.h> +#include <linux/slab.h> +#include <video/edid.h> +#include <video/uvesafb.h> +#ifdef CONFIG_X86 +#include <video/vga.h> +#endif +#include "edid.h" + +static struct cb_id uvesafb_cn_id = { + .idx = CN_IDX_V86D, + .val = CN_VAL_V86D_UVESAFB +}; +static char v86d_path[PATH_MAX] = "/sbin/v86d"; +static char v86d_started; /* has v86d been started by uvesafb? */ + +static const struct fb_fix_screeninfo uvesafb_fix = { + .id = "VESA VGA", + .type = FB_TYPE_PACKED_PIXELS, + .accel = FB_ACCEL_NONE, + .visual = FB_VISUAL_TRUECOLOR, +}; + +static int mtrr = 3; /* enable mtrr by default */ +static bool blank = true; /* enable blanking by default */ +static int ypan = 1; /* 0: scroll, 1: ypan, 2: ywrap */ +static bool pmi_setpal = true; /* use PMI for palette changes */ +static bool nocrtc; /* ignore CRTC settings */ +static bool noedid; /* don't try DDC transfers */ +static int vram_remap; /* set amt. of memory to be used */ +static int vram_total; /* set total amount of memory */ +static u16 maxclk; /* maximum pixel clock */ +static u16 maxvf; /* maximum vertical frequency */ +static u16 maxhf; /* maximum horizontal frequency */ +static u16 vbemode; /* force use of a specific VBE mode */ +static char *mode_option; +static u8 dac_width = 6; + +static struct uvesafb_ktask *uvfb_tasks[UVESAFB_TASKS_MAX]; +static DEFINE_MUTEX(uvfb_lock); + +/* + * A handler for replies from userspace. + * + * Make sure each message passes consistency checks and if it does, + * find the kernel part of the task struct, copy the registers and + * the buffer contents and then complete the task. + */ +static void uvesafb_cn_callback(struct cn_msg *msg, struct netlink_skb_parms *nsp) +{ + struct uvesafb_task *utask; + struct uvesafb_ktask *task; + + if (!capable(CAP_SYS_ADMIN)) + return; + + if (msg->seq >= UVESAFB_TASKS_MAX) + return; + + mutex_lock(&uvfb_lock); + task = uvfb_tasks[msg->seq]; + + if (!task || msg->ack != task->ack) { + mutex_unlock(&uvfb_lock); + return; + } + + utask = (struct uvesafb_task *)msg->data; + + /* Sanity checks for the buffer length. */ + if (task->t.buf_len < utask->buf_len || + utask->buf_len > msg->len - sizeof(*utask)) { + mutex_unlock(&uvfb_lock); + return; + } + + uvfb_tasks[msg->seq] = NULL; + mutex_unlock(&uvfb_lock); + + memcpy(&task->t, utask, sizeof(*utask)); + + if (task->t.buf_len && task->buf) + memcpy(task->buf, utask + 1, task->t.buf_len); + + complete(task->done); + return; +} + +static int uvesafb_helper_start(void) +{ + char *envp[] = { + "HOME=/", + "PATH=/sbin:/bin", + NULL, + }; + + char *argv[] = { + v86d_path, + NULL, + }; + + return call_usermodehelper(v86d_path, argv, envp, UMH_WAIT_PROC); +} + +/* + * Execute a uvesafb task. + * + * Returns 0 if the task is executed successfully. + * + * A message sent to the userspace consists of the uvesafb_task + * struct and (optionally) a buffer. The uvesafb_task struct is + * a simplified version of uvesafb_ktask (its kernel counterpart) + * containing only the register values, flags and the length of + * the buffer. + * + * Each message is assigned a sequence number (increased linearly) + * and a random ack number. The sequence number is used as a key + * for the uvfb_tasks array which holds pointers to uvesafb_ktask + * structs for all requests. + */ +static int uvesafb_exec(struct uvesafb_ktask *task) +{ + static int seq; + struct cn_msg *m; + int err; + int len = sizeof(task->t) + task->t.buf_len; + + /* + * Check whether the message isn't longer than the maximum + * allowed by connector. + */ + if (sizeof(*m) + len > CONNECTOR_MAX_MSG_SIZE) { + pr_warn("message too long (%d), can't execute task\n", + (int)(sizeof(*m) + len)); + return -E2BIG; + } + + m = kzalloc(sizeof(*m) + len, GFP_KERNEL); + if (!m) + return -ENOMEM; + + init_completion(task->done); + + memcpy(&m->id, &uvesafb_cn_id, sizeof(m->id)); + m->seq = seq; + m->len = len; + m->ack = prandom_u32(); + + /* uvesafb_task structure */ + memcpy(m + 1, &task->t, sizeof(task->t)); + + /* Buffer */ + memcpy((u8 *)(m + 1) + sizeof(task->t), task->buf, task->t.buf_len); + + /* + * Save the message ack number so that we can find the kernel + * part of this task when a reply is received from userspace. + */ + task->ack = m->ack; + + mutex_lock(&uvfb_lock); + + /* If all slots are taken -- bail out. */ + if (uvfb_tasks[seq]) { + mutex_unlock(&uvfb_lock); + err = -EBUSY; + goto out; + } + + /* Save a pointer to the kernel part of the task struct. */ + uvfb_tasks[seq] = task; + mutex_unlock(&uvfb_lock); + + err = cn_netlink_send(m, 0, 0, GFP_KERNEL); + if (err == -ESRCH) { + /* + * Try to start the userspace helper if sending + * the request failed the first time. + */ + err = uvesafb_helper_start(); + if (err) { + pr_err("failed to execute %s\n", v86d_path); + pr_err("make sure that the v86d helper is installed and executable\n"); + } else { + v86d_started = 1; + err = cn_netlink_send(m, 0, 0, gfp_any()); + if (err == -ENOBUFS) + err = 0; + } + } else if (err == -ENOBUFS) + err = 0; + + if (!err && !(task->t.flags & TF_EXIT)) + err = !wait_for_completion_timeout(task->done, + msecs_to_jiffies(UVESAFB_TIMEOUT)); + + mutex_lock(&uvfb_lock); + uvfb_tasks[seq] = NULL; + mutex_unlock(&uvfb_lock); + + seq++; + if (seq >= UVESAFB_TASKS_MAX) + seq = 0; +out: + kfree(m); + return err; +} + +/* + * Free a uvesafb_ktask struct. + */ +static void uvesafb_free(struct uvesafb_ktask *task) +{ + if (task) { + kfree(task->done); + kfree(task); + } +} + +/* + * Prepare a uvesafb_ktask struct to be used again. + */ +static void uvesafb_reset(struct uvesafb_ktask *task) +{ + struct completion *cpl = task->done; + + memset(task, 0, sizeof(*task)); + task->done = cpl; +} + +/* + * Allocate and prepare a uvesafb_ktask struct. + */ +static struct uvesafb_ktask *uvesafb_prep(void) +{ + struct uvesafb_ktask *task; + + task = kzalloc(sizeof(*task), GFP_KERNEL); + if (task) { + task->done = kzalloc(sizeof(*task->done), GFP_KERNEL); + if (!task->done) { + kfree(task); + task = NULL; + } + } + return task; +} + +static void uvesafb_setup_var(struct fb_var_screeninfo *var, + struct fb_info *info, struct vbe_mode_ib *mode) +{ + struct uvesafb_par *par = info->par; + + var->vmode = FB_VMODE_NONINTERLACED; + var->sync = FB_SYNC_VERT_HIGH_ACT; + + var->xres = mode->x_res; + var->yres = mode->y_res; + var->xres_virtual = mode->x_res; + var->yres_virtual = (par->ypan) ? + info->fix.smem_len / mode->bytes_per_scan_line : + mode->y_res; + var->xoffset = 0; + var->yoffset = 0; + var->bits_per_pixel = mode->bits_per_pixel; + + if (var->bits_per_pixel == 15) + var->bits_per_pixel = 16; + + if (var->bits_per_pixel > 8) { + var->red.offset = mode->red_off; + var->red.length = mode->red_len; + var->green.offset = mode->green_off; + var->green.length = mode->green_len; + var->blue.offset = mode->blue_off; + var->blue.length = mode->blue_len; + var->transp.offset = mode->rsvd_off; + var->transp.length = mode->rsvd_len; + } else { + var->red.offset = 0; + var->green.offset = 0; + var->blue.offset = 0; + var->transp.offset = 0; + + var->red.length = 8; + var->green.length = 8; + var->blue.length = 8; + var->transp.length = 0; + } +} + +static int uvesafb_vbe_find_mode(struct uvesafb_par *par, + int xres, int yres, int depth, unsigned char flags) +{ + int i, match = -1, h = 0, d = 0x7fffffff; + + for (i = 0; i < par->vbe_modes_cnt; i++) { + h = abs(par->vbe_modes[i].x_res - xres) + + abs(par->vbe_modes[i].y_res - yres) + + abs(depth - par->vbe_modes[i].depth); + + /* + * We have an exact match in terms of resolution + * and depth. + */ + if (h == 0) + return i; + + if (h < d || (h == d && par->vbe_modes[i].depth > depth)) { + d = h; + match = i; + } + } + i = 1; + + if (flags & UVESAFB_EXACT_DEPTH && + par->vbe_modes[match].depth != depth) + i = 0; + + if (flags & UVESAFB_EXACT_RES && d > 24) + i = 0; + + if (i != 0) + return match; + else + return -1; +} + +static u8 *uvesafb_vbe_state_save(struct uvesafb_par *par) +{ + struct uvesafb_ktask *task; + u8 *state; + int err; + + if (!par->vbe_state_size) + return NULL; + + state = kmalloc(par->vbe_state_size, GFP_KERNEL); + if (!state) + return ERR_PTR(-ENOMEM); + + task = uvesafb_prep(); + if (!task) { + kfree(state); + return NULL; + } + + task->t.regs.eax = 0x4f04; + task->t.regs.ecx = 0x000f; + task->t.regs.edx = 0x0001; + task->t.flags = TF_BUF_RET | TF_BUF_ESBX; + task->t.buf_len = par->vbe_state_size; + task->buf = state; + err = uvesafb_exec(task); + + if (err || (task->t.regs.eax & 0xffff) != 0x004f) { + pr_warn("VBE get state call failed (eax=0x%x, err=%d)\n", + task->t.regs.eax, err); + kfree(state); + state = NULL; + } + + uvesafb_free(task); + return state; +} + +static void uvesafb_vbe_state_restore(struct uvesafb_par *par, u8 *state_buf) +{ + struct uvesafb_ktask *task; + int err; + + if (!state_buf) + return; + + task = uvesafb_prep(); + if (!task) + return; + + task->t.regs.eax = 0x4f04; + task->t.regs.ecx = 0x000f; + task->t.regs.edx = 0x0002; + task->t.buf_len = par->vbe_state_size; + task->t.flags = TF_BUF_ESBX; + task->buf = state_buf; + + err = uvesafb_exec(task); + if (err || (task->t.regs.eax & 0xffff) != 0x004f) + pr_warn("VBE state restore call failed (eax=0x%x, err=%d)\n", + task->t.regs.eax, err); + + uvesafb_free(task); +} + +static int uvesafb_vbe_getinfo(struct uvesafb_ktask *task, + struct uvesafb_par *par) +{ + int err; + + task->t.regs.eax = 0x4f00; + task->t.flags = TF_VBEIB; + task->t.buf_len = sizeof(struct vbe_ib); + task->buf = &par->vbe_ib; + strncpy(par->vbe_ib.vbe_signature, "VBE2", 4); + + err = uvesafb_exec(task); + if (err || (task->t.regs.eax & 0xffff) != 0x004f) { + pr_err("Getting VBE info block failed (eax=0x%x, err=%d)\n", + (u32)task->t.regs.eax, err); + return -EINVAL; + } + + if (par->vbe_ib.vbe_version < 0x0200) { + pr_err("Sorry, pre-VBE 2.0 cards are not supported\n"); + return -EINVAL; + } + + if (!par->vbe_ib.mode_list_ptr) { + pr_err("Missing mode list!\n"); + return -EINVAL; + } + + pr_info(""); + + /* + * Convert string pointers and the mode list pointer into + * usable addresses. Print informational messages about the + * video adapter and its vendor. + */ + if (par->vbe_ib.oem_vendor_name_ptr) + pr_cont("%s, ", + ((char *)task->buf) + par->vbe_ib.oem_vendor_name_ptr); + + if (par->vbe_ib.oem_product_name_ptr) + pr_cont("%s, ", + ((char *)task->buf) + par->vbe_ib.oem_product_name_ptr); + + if (par->vbe_ib.oem_product_rev_ptr) + pr_cont("%s, ", + ((char *)task->buf) + par->vbe_ib.oem_product_rev_ptr); + + if (par->vbe_ib.oem_string_ptr) + pr_cont("OEM: %s, ", + ((char *)task->buf) + par->vbe_ib.oem_string_ptr); + + pr_cont("VBE v%d.%d\n", + (par->vbe_ib.vbe_version & 0xff00) >> 8, + par->vbe_ib.vbe_version & 0xff); + + return 0; +} + +static int uvesafb_vbe_getmodes(struct uvesafb_ktask *task, + struct uvesafb_par *par) +{ + int off = 0, err; + u16 *mode; + + par->vbe_modes_cnt = 0; + + /* Count available modes. */ + mode = (u16 *) (((u8 *)&par->vbe_ib) + par->vbe_ib.mode_list_ptr); + while (*mode != 0xffff) { + par->vbe_modes_cnt++; + mode++; + } + + par->vbe_modes = kcalloc(par->vbe_modes_cnt, + sizeof(struct vbe_mode_ib), + GFP_KERNEL); + if (!par->vbe_modes) + return -ENOMEM; + + /* Get info about all available modes. */ + mode = (u16 *) (((u8 *)&par->vbe_ib) + par->vbe_ib.mode_list_ptr); + while (*mode != 0xffff) { + struct vbe_mode_ib *mib; + + uvesafb_reset(task); + task->t.regs.eax = 0x4f01; + task->t.regs.ecx = (u32) *mode; + task->t.flags = TF_BUF_RET | TF_BUF_ESDI; + task->t.buf_len = sizeof(struct vbe_mode_ib); + task->buf = par->vbe_modes + off; + + err = uvesafb_exec(task); + if (err || (task->t.regs.eax & 0xffff) != 0x004f) { + pr_warn("Getting mode info block for mode 0x%x failed (eax=0x%x, err=%d)\n", + *mode, (u32)task->t.regs.eax, err); + mode++; + par->vbe_modes_cnt--; + continue; + } + + mib = task->buf; + mib->mode_id = *mode; + + /* + * We only want modes that are supported with the current + * hardware configuration, color, graphics and that have + * support for the LFB. + */ + if ((mib->mode_attr & VBE_MODE_MASK) == VBE_MODE_MASK && + mib->bits_per_pixel >= 8) + off++; + else + par->vbe_modes_cnt--; + + mode++; + mib->depth = mib->red_len + mib->green_len + mib->blue_len; + + /* + * Handle 8bpp modes and modes with broken color component + * lengths. + */ + if (mib->depth == 0 || (mib->depth == 24 && + mib->bits_per_pixel == 32)) + mib->depth = mib->bits_per_pixel; + } + + if (par->vbe_modes_cnt > 0) + return 0; + else + return -EINVAL; +} + +/* + * The Protected Mode Interface is 32-bit x86 code, so we only run it on + * x86 and not x86_64. + */ +#ifdef CONFIG_X86_32 +static int uvesafb_vbe_getpmi(struct uvesafb_ktask *task, + struct uvesafb_par *par) +{ + int i, err; + + uvesafb_reset(task); + task->t.regs.eax = 0x4f0a; + task->t.regs.ebx = 0x0; + err = uvesafb_exec(task); + + if ((task->t.regs.eax & 0xffff) != 0x4f || task->t.regs.es < 0xc000) { + par->pmi_setpal = par->ypan = 0; + } else { + par->pmi_base = (u16 *)phys_to_virt(((u32)task->t.regs.es << 4) + + task->t.regs.edi); + par->pmi_start = (u8 *)par->pmi_base + par->pmi_base[1]; + par->pmi_pal = (u8 *)par->pmi_base + par->pmi_base[2]; + pr_info("protected mode interface info at %04x:%04x\n", + (u16)task->t.regs.es, (u16)task->t.regs.edi); + pr_info("pmi: set display start = %p, set palette = %p\n", + par->pmi_start, par->pmi_pal); + + if (par->pmi_base[3]) { + pr_info("pmi: ports ="); + for (i = par->pmi_base[3]/2; + par->pmi_base[i] != 0xffff; i++) + pr_cont(" %x", par->pmi_base[i]); + pr_cont("\n"); + + if (par->pmi_base[i] != 0xffff) { + pr_info("can't handle memory requests, pmi disabled\n"); + par->ypan = par->pmi_setpal = 0; + } + } + } + return 0; +} +#endif /* CONFIG_X86_32 */ + +/* + * Check whether a video mode is supported by the Video BIOS and is + * compatible with the monitor limits. + */ +static int uvesafb_is_valid_mode(struct fb_videomode *mode, + struct fb_info *info) +{ + if (info->monspecs.gtf) { + fb_videomode_to_var(&info->var, mode); + if (fb_validate_mode(&info->var, info)) + return 0; + } + + if (uvesafb_vbe_find_mode(info->par, mode->xres, mode->yres, 8, + UVESAFB_EXACT_RES) == -1) + return 0; + + return 1; +} + +static int uvesafb_vbe_getedid(struct uvesafb_ktask *task, struct fb_info *info) +{ + struct uvesafb_par *par = info->par; + int err = 0; + + if (noedid || par->vbe_ib.vbe_version < 0x0300) + return -EINVAL; + + task->t.regs.eax = 0x4f15; + task->t.regs.ebx = 0; + task->t.regs.ecx = 0; + task->t.buf_len = 0; + task->t.flags = 0; + + err = uvesafb_exec(task); + + if ((task->t.regs.eax & 0xffff) != 0x004f || err) + return -EINVAL; + + if ((task->t.regs.ebx & 0x3) == 3) { + pr_info("VBIOS/hardware supports both DDC1 and DDC2 transfers\n"); + } else if ((task->t.regs.ebx & 0x3) == 2) { + pr_info("VBIOS/hardware supports DDC2 transfers\n"); + } else if ((task->t.regs.ebx & 0x3) == 1) { + pr_info("VBIOS/hardware supports DDC1 transfers\n"); + } else { + pr_info("VBIOS/hardware doesn't support DDC transfers\n"); + return -EINVAL; + } + + task->t.regs.eax = 0x4f15; + task->t.regs.ebx = 1; + task->t.regs.ecx = task->t.regs.edx = 0; + task->t.flags = TF_BUF_RET | TF_BUF_ESDI; + task->t.buf_len = EDID_LENGTH; + task->buf = kzalloc(EDID_LENGTH, GFP_KERNEL); + if (!task->buf) + return -ENOMEM; + + err = uvesafb_exec(task); + + if ((task->t.regs.eax & 0xffff) == 0x004f && !err) { + fb_edid_to_monspecs(task->buf, &info->monspecs); + + if (info->monspecs.vfmax && info->monspecs.hfmax) { + /* + * If the maximum pixel clock wasn't specified in + * the EDID block, set it to 300 MHz. + */ + if (info->monspecs.dclkmax == 0) + info->monspecs.dclkmax = 300 * 1000000; + info->monspecs.gtf = 1; + } + } else { + err = -EINVAL; + } + + kfree(task->buf); + return err; +} + +static void uvesafb_vbe_getmonspecs(struct uvesafb_ktask *task, + struct fb_info *info) +{ + struct uvesafb_par *par = info->par; + int i; + + memset(&info->monspecs, 0, sizeof(info->monspecs)); + + /* + * If we don't get all necessary data from the EDID block, + * mark it as incompatible with the GTF and set nocrtc so + * that we always use the default BIOS refresh rate. + */ + if (uvesafb_vbe_getedid(task, info)) { + info->monspecs.gtf = 0; + par->nocrtc = 1; + } + + /* Kernel command line overrides. */ + if (maxclk) + info->monspecs.dclkmax = maxclk * 1000000; + if (maxvf) + info->monspecs.vfmax = maxvf; + if (maxhf) + info->monspecs.hfmax = maxhf * 1000; + + /* + * In case DDC transfers are not supported, the user can provide + * monitor limits manually. Lower limits are set to "safe" values. + */ + if (info->monspecs.gtf == 0 && maxclk && maxvf && maxhf) { + info->monspecs.dclkmin = 0; + info->monspecs.vfmin = 60; + info->monspecs.hfmin = 29000; + info->monspecs.gtf = 1; + par->nocrtc = 0; + } + + if (info->monspecs.gtf) + pr_info("monitor limits: vf = %d Hz, hf = %d kHz, clk = %d MHz\n", + info->monspecs.vfmax, + (int)(info->monspecs.hfmax / 1000), + (int)(info->monspecs.dclkmax / 1000000)); + else + pr_info("no monitor limits have been set, default refresh rate will be used\n"); + + /* Add VBE modes to the modelist. */ + for (i = 0; i < par->vbe_modes_cnt; i++) { + struct fb_var_screeninfo var; + struct vbe_mode_ib *mode; + struct fb_videomode vmode; + + mode = &par->vbe_modes[i]; + memset(&var, 0, sizeof(var)); + + var.xres = mode->x_res; + var.yres = mode->y_res; + + fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60, &var, info); + fb_var_to_videomode(&vmode, &var); + fb_add_videomode(&vmode, &info->modelist); + } + + /* Add valid VESA modes to our modelist. */ + for (i = 0; i < VESA_MODEDB_SIZE; i++) { + if (uvesafb_is_valid_mode((struct fb_videomode *) + &vesa_modes[i], info)) + fb_add_videomode(&vesa_modes[i], &info->modelist); + } + + for (i = 0; i < info->monspecs.modedb_len; i++) { + if (uvesafb_is_valid_mode(&info->monspecs.modedb[i], info)) + fb_add_videomode(&info->monspecs.modedb[i], + &info->modelist); + } + + return; +} + +static void uvesafb_vbe_getstatesize(struct uvesafb_ktask *task, + struct uvesafb_par *par) +{ + int err; + + uvesafb_reset(task); + + /* + * Get the VBE state buffer size. We want all available + * hardware state data (CL = 0x0f). + */ + task->t.regs.eax = 0x4f04; + task->t.regs.ecx = 0x000f; + task->t.regs.edx = 0x0000; + task->t.flags = 0; + + err = uvesafb_exec(task); + + if (err || (task->t.regs.eax & 0xffff) != 0x004f) { + pr_warn("VBE state buffer size cannot be determined (eax=0x%x, err=%d)\n", + task->t.regs.eax, err); + par->vbe_state_size = 0; + return; + } + + par->vbe_state_size = 64 * (task->t.regs.ebx & 0xffff); +} + +static int uvesafb_vbe_init(struct fb_info *info) +{ + struct uvesafb_ktask *task = NULL; + struct uvesafb_par *par = info->par; + int err; + + task = uvesafb_prep(); + if (!task) + return -ENOMEM; + + err = uvesafb_vbe_getinfo(task, par); + if (err) + goto out; + + err = uvesafb_vbe_getmodes(task, par); + if (err) + goto out; + + par->nocrtc = nocrtc; +#ifdef CONFIG_X86_32 + par->pmi_setpal = pmi_setpal; + par->ypan = ypan; + + if (par->pmi_setpal || par->ypan) { + if (__supported_pte_mask & _PAGE_NX) { + par->pmi_setpal = par->ypan = 0; + pr_warn("NX protection is active, better not use the PMI\n"); + } else { + uvesafb_vbe_getpmi(task, par); + } + } +#else + /* The protected mode interface is not available on non-x86. */ + par->pmi_setpal = par->ypan = 0; +#endif + + INIT_LIST_HEAD(&info->modelist); + uvesafb_vbe_getmonspecs(task, info); + uvesafb_vbe_getstatesize(task, par); + +out: uvesafb_free(task); + return err; +} + +static int uvesafb_vbe_init_mode(struct fb_info *info) +{ + struct list_head *pos; + struct fb_modelist *modelist; + struct fb_videomode *mode; + struct uvesafb_par *par = info->par; + int i, modeid; + + /* Has the user requested a specific VESA mode? */ + if (vbemode) { + for (i = 0; i < par->vbe_modes_cnt; i++) { + if (par->vbe_modes[i].mode_id == vbemode) { + modeid = i; + uvesafb_setup_var(&info->var, info, + &par->vbe_modes[modeid]); + fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60, + &info->var, info); + /* + * With pixclock set to 0, the default BIOS + * timings will be used in set_par(). + */ + info->var.pixclock = 0; + goto gotmode; + } + } + pr_info("requested VBE mode 0x%x is unavailable\n", vbemode); + vbemode = 0; + } + + /* Count the modes in the modelist */ + i = 0; + list_for_each(pos, &info->modelist) + i++; + + /* + * Convert the modelist into a modedb so that we can use it with + * fb_find_mode(). + */ + mode = kcalloc(i, sizeof(*mode), GFP_KERNEL); + if (mode) { + i = 0; + list_for_each(pos, &info->modelist) { + modelist = list_entry(pos, struct fb_modelist, list); + mode[i] = modelist->mode; + i++; + } + + if (!mode_option) + mode_option = UVESAFB_DEFAULT_MODE; + + i = fb_find_mode(&info->var, info, mode_option, mode, i, + NULL, 8); + + kfree(mode); + } + + /* fb_find_mode() failed */ + if (i == 0) { + info->var.xres = 640; + info->var.yres = 480; + mode = (struct fb_videomode *) + fb_find_best_mode(&info->var, &info->modelist); + + if (mode) { + fb_videomode_to_var(&info->var, mode); + } else { + modeid = par->vbe_modes[0].mode_id; + uvesafb_setup_var(&info->var, info, + &par->vbe_modes[modeid]); + fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60, + &info->var, info); + + goto gotmode; + } + } + + /* Look for a matching VBE mode. */ + modeid = uvesafb_vbe_find_mode(par, info->var.xres, info->var.yres, + info->var.bits_per_pixel, UVESAFB_EXACT_RES); + + if (modeid == -1) + return -EINVAL; + + uvesafb_setup_var(&info->var, info, &par->vbe_modes[modeid]); + +gotmode: + /* + * If we are not VBE3.0+ compliant, we're done -- the BIOS will + * ignore our timings anyway. + */ + if (par->vbe_ib.vbe_version < 0x0300 || par->nocrtc) + fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60, + &info->var, info); + + return modeid; +} + +static int uvesafb_setpalette(struct uvesafb_pal_entry *entries, int count, + int start, struct fb_info *info) +{ + struct uvesafb_ktask *task; +#ifdef CONFIG_X86 + struct uvesafb_par *par = info->par; + int i = par->mode_idx; +#endif + int err = 0; + + /* + * We support palette modifications for 8 bpp modes only, so + * there can never be more than 256 entries. + */ + if (start + count > 256) + return -EINVAL; + +#ifdef CONFIG_X86 + /* Use VGA registers if mode is VGA-compatible. */ + if (i >= 0 && i < par->vbe_modes_cnt && + par->vbe_modes[i].mode_attr & VBE_MODE_VGACOMPAT) { + for (i = 0; i < count; i++) { + outb_p(start + i, dac_reg); + outb_p(entries[i].red, dac_val); + outb_p(entries[i].green, dac_val); + outb_p(entries[i].blue, dac_val); + } + } +#ifdef CONFIG_X86_32 + else if (par->pmi_setpal) { + __asm__ __volatile__( + "call *(%%esi)" + : /* no return value */ + : "a" (0x4f09), /* EAX */ + "b" (0), /* EBX */ + "c" (count), /* ECX */ + "d" (start), /* EDX */ + "D" (entries), /* EDI */ + "S" (&par->pmi_pal)); /* ESI */ + } +#endif /* CONFIG_X86_32 */ + else +#endif /* CONFIG_X86 */ + { + task = uvesafb_prep(); + if (!task) + return -ENOMEM; + + task->t.regs.eax = 0x4f09; + task->t.regs.ebx = 0x0; + task->t.regs.ecx = count; + task->t.regs.edx = start; + task->t.flags = TF_BUF_ESDI; + task->t.buf_len = sizeof(struct uvesafb_pal_entry) * count; + task->buf = entries; + + err = uvesafb_exec(task); + if ((task->t.regs.eax & 0xffff) != 0x004f) + err = 1; + + uvesafb_free(task); + } + return err; +} + +static int uvesafb_setcolreg(unsigned regno, unsigned red, unsigned green, + unsigned blue, unsigned transp, + struct fb_info *info) +{ + struct uvesafb_pal_entry entry; + int shift = 16 - dac_width; + int err = 0; + + if (regno >= info->cmap.len) + return -EINVAL; + + if (info->var.bits_per_pixel == 8) { + entry.red = red >> shift; + entry.green = green >> shift; + entry.blue = blue >> shift; + entry.pad = 0; + + err = uvesafb_setpalette(&entry, 1, regno, info); + } else if (regno < 16) { + switch (info->var.bits_per_pixel) { + case 16: + if (info->var.red.offset == 10) { + /* 1:5:5:5 */ + ((u32 *) (info->pseudo_palette))[regno] = + ((red & 0xf800) >> 1) | + ((green & 0xf800) >> 6) | + ((blue & 0xf800) >> 11); + } else { + /* 0:5:6:5 */ + ((u32 *) (info->pseudo_palette))[regno] = + ((red & 0xf800) ) | + ((green & 0xfc00) >> 5) | + ((blue & 0xf800) >> 11); + } + break; + + case 24: + case 32: + red >>= 8; + green >>= 8; + blue >>= 8; + ((u32 *)(info->pseudo_palette))[regno] = + (red << info->var.red.offset) | + (green << info->var.green.offset) | + (blue << info->var.blue.offset); + break; + } + } + return err; +} + +static int uvesafb_setcmap(struct fb_cmap *cmap, struct fb_info *info) +{ + struct uvesafb_pal_entry *entries; + int shift = 16 - dac_width; + int i, err = 0; + + if (info->var.bits_per_pixel == 8) { + if (cmap->start + cmap->len > info->cmap.start + + info->cmap.len || cmap->start < info->cmap.start) + return -EINVAL; + + entries = kmalloc_array(cmap->len, sizeof(*entries), + GFP_KERNEL); + if (!entries) + return -ENOMEM; + + for (i = 0; i < cmap->len; i++) { + entries[i].red = cmap->red[i] >> shift; + entries[i].green = cmap->green[i] >> shift; + entries[i].blue = cmap->blue[i] >> shift; + entries[i].pad = 0; + } + err = uvesafb_setpalette(entries, cmap->len, cmap->start, info); + kfree(entries); + } else { + /* + * For modes with bpp > 8, we only set the pseudo palette in + * the fb_info struct. We rely on uvesafb_setcolreg to do all + * sanity checking. + */ + for (i = 0; i < cmap->len; i++) { + err |= uvesafb_setcolreg(cmap->start + i, cmap->red[i], + cmap->green[i], cmap->blue[i], + 0, info); + } + } + return err; +} + +static int uvesafb_pan_display(struct fb_var_screeninfo *var, + struct fb_info *info) +{ +#ifdef CONFIG_X86_32 + int offset; + struct uvesafb_par *par = info->par; + + offset = (var->yoffset * info->fix.line_length + var->xoffset) / 4; + + /* + * It turns out it's not the best idea to do panning via vm86, + * so we only allow it if we have a PMI. + */ + if (par->pmi_start) { + __asm__ __volatile__( + "call *(%%edi)" + : /* no return value */ + : "a" (0x4f07), /* EAX */ + "b" (0), /* EBX */ + "c" (offset), /* ECX */ + "d" (offset >> 16), /* EDX */ + "D" (&par->pmi_start)); /* EDI */ + } +#endif + return 0; +} + +static int uvesafb_blank(int blank, struct fb_info *info) +{ + struct uvesafb_ktask *task; + int err = 1; +#ifdef CONFIG_X86 + struct uvesafb_par *par = info->par; + + if (par->vbe_ib.capabilities & VBE_CAP_VGACOMPAT) { + int loop = 10000; + u8 seq = 0, crtc17 = 0; + + if (blank == FB_BLANK_POWERDOWN) { + seq = 0x20; + crtc17 = 0x00; + err = 0; + } else { + seq = 0x00; + crtc17 = 0x80; + err = (blank == FB_BLANK_UNBLANK) ? 0 : -EINVAL; + } + + vga_wseq(NULL, 0x00, 0x01); + seq |= vga_rseq(NULL, 0x01) & ~0x20; + vga_wseq(NULL, 0x00, seq); + + crtc17 |= vga_rcrt(NULL, 0x17) & ~0x80; + while (loop--); + vga_wcrt(NULL, 0x17, crtc17); + vga_wseq(NULL, 0x00, 0x03); + } else +#endif /* CONFIG_X86 */ + { + task = uvesafb_prep(); + if (!task) + return -ENOMEM; + + task->t.regs.eax = 0x4f10; + switch (blank) { + case FB_BLANK_UNBLANK: + task->t.regs.ebx = 0x0001; + break; + case FB_BLANK_NORMAL: + task->t.regs.ebx = 0x0101; /* standby */ + break; + case FB_BLANK_POWERDOWN: + task->t.regs.ebx = 0x0401; /* powerdown */ + break; + default: + goto out; + } + + err = uvesafb_exec(task); + if (err || (task->t.regs.eax & 0xffff) != 0x004f) + err = 1; +out: uvesafb_free(task); + } + return err; +} + +static int uvesafb_open(struct fb_info *info, int user) +{ + struct uvesafb_par *par = info->par; + int cnt = atomic_read(&par->ref_count); + u8 *buf = NULL; + + if (!cnt && par->vbe_state_size) { + buf = uvesafb_vbe_state_save(par); + if (IS_ERR(buf)) { + pr_warn("save hardware state failed, error code is %ld!\n", + PTR_ERR(buf)); + } else { + par->vbe_state_orig = buf; + } + } + + atomic_inc(&par->ref_count); + return 0; +} + +static int uvesafb_release(struct fb_info *info, int user) +{ + struct uvesafb_ktask *task = NULL; + struct uvesafb_par *par = info->par; + int cnt = atomic_read(&par->ref_count); + + if (!cnt) + return -EINVAL; + + if (cnt != 1) + goto out; + + task = uvesafb_prep(); + if (!task) + goto out; + + /* First, try to set the standard 80x25 text mode. */ + task->t.regs.eax = 0x0003; + uvesafb_exec(task); + + /* + * Now try to restore whatever hardware state we might have + * saved when the fb device was first opened. + */ + uvesafb_vbe_state_restore(par, par->vbe_state_orig); +out: + atomic_dec(&par->ref_count); + uvesafb_free(task); + return 0; +} + +static int uvesafb_set_par(struct fb_info *info) +{ + struct uvesafb_par *par = info->par; + struct uvesafb_ktask *task = NULL; + struct vbe_crtc_ib *crtc = NULL; + struct vbe_mode_ib *mode = NULL; + int i, err = 0, depth = info->var.bits_per_pixel; + + if (depth > 8 && depth != 32) + depth = info->var.red.length + info->var.green.length + + info->var.blue.length; + + i = uvesafb_vbe_find_mode(par, info->var.xres, info->var.yres, depth, + UVESAFB_EXACT_RES | UVESAFB_EXACT_DEPTH); + if (i >= 0) + mode = &par->vbe_modes[i]; + else + return -EINVAL; + + task = uvesafb_prep(); + if (!task) + return -ENOMEM; +setmode: + task->t.regs.eax = 0x4f02; + task->t.regs.ebx = mode->mode_id | 0x4000; /* use LFB */ + + if (par->vbe_ib.vbe_version >= 0x0300 && !par->nocrtc && + info->var.pixclock != 0) { + task->t.regs.ebx |= 0x0800; /* use CRTC data */ + task->t.flags = TF_BUF_ESDI; + crtc = kzalloc(sizeof(struct vbe_crtc_ib), GFP_KERNEL); + if (!crtc) { + err = -ENOMEM; + goto out; + } + crtc->horiz_start = info->var.xres + info->var.right_margin; + crtc->horiz_end = crtc->horiz_start + info->var.hsync_len; + crtc->horiz_total = crtc->horiz_end + info->var.left_margin; + + crtc->vert_start = info->var.yres + info->var.lower_margin; + crtc->vert_end = crtc->vert_start + info->var.vsync_len; + crtc->vert_total = crtc->vert_end + info->var.upper_margin; + + crtc->pixel_clock = PICOS2KHZ(info->var.pixclock) * 1000; + crtc->refresh_rate = (u16)(100 * (crtc->pixel_clock / + (crtc->vert_total * crtc->horiz_total))); + + if (info->var.vmode & FB_VMODE_DOUBLE) + crtc->flags |= 0x1; + if (info->var.vmode & FB_VMODE_INTERLACED) + crtc->flags |= 0x2; + if (!(info->var.sync & FB_SYNC_HOR_HIGH_ACT)) + crtc->flags |= 0x4; + if (!(info->var.sync & FB_SYNC_VERT_HIGH_ACT)) + crtc->flags |= 0x8; + memcpy(&par->crtc, crtc, sizeof(*crtc)); + } else { + memset(&par->crtc, 0, sizeof(*crtc)); + } + + task->t.buf_len = sizeof(struct vbe_crtc_ib); + task->buf = &par->crtc; + + err = uvesafb_exec(task); + if (err || (task->t.regs.eax & 0xffff) != 0x004f) { + /* + * The mode switch might have failed because we tried to + * use our own timings. Try again with the default timings. + */ + if (crtc != NULL) { + pr_warn("mode switch failed (eax=0x%x, err=%d) - trying again with default timings\n", + task->t.regs.eax, err); + uvesafb_reset(task); + kfree(crtc); + crtc = NULL; + info->var.pixclock = 0; + goto setmode; + } else { + pr_err("mode switch failed (eax=0x%x, err=%d)\n", + task->t.regs.eax, err); + err = -EINVAL; + goto out; + } + } + par->mode_idx = i; + + /* For 8bpp modes, always try to set the DAC to 8 bits. */ + if (par->vbe_ib.capabilities & VBE_CAP_CAN_SWITCH_DAC && + mode->bits_per_pixel <= 8) { + uvesafb_reset(task); + task->t.regs.eax = 0x4f08; + task->t.regs.ebx = 0x0800; + + err = uvesafb_exec(task); + if (err || (task->t.regs.eax & 0xffff) != 0x004f || + ((task->t.regs.ebx & 0xff00) >> 8) != 8) { + dac_width = 6; + } else { + dac_width = 8; + } + } + + info->fix.visual = (info->var.bits_per_pixel == 8) ? + FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR; + info->fix.line_length = mode->bytes_per_scan_line; + +out: + kfree(crtc); + uvesafb_free(task); + + return err; +} + +static void uvesafb_check_limits(struct fb_var_screeninfo *var, + struct fb_info *info) +{ + const struct fb_videomode *mode; + struct uvesafb_par *par = info->par; + + /* + * If pixclock is set to 0, then we're using default BIOS timings + * and thus don't have to perform any checks here. + */ + if (!var->pixclock) + return; + + if (par->vbe_ib.vbe_version < 0x0300) { + fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60, var, info); + return; + } + + if (!fb_validate_mode(var, info)) + return; + + mode = fb_find_best_mode(var, &info->modelist); + if (mode) { + if (mode->xres == var->xres && mode->yres == var->yres && + !(mode->vmode & (FB_VMODE_INTERLACED | FB_VMODE_DOUBLE))) { + fb_videomode_to_var(var, mode); + return; + } + } + + if (info->monspecs.gtf && !fb_get_mode(FB_MAXTIMINGS, 0, var, info)) + return; + /* Use default refresh rate */ + var->pixclock = 0; +} + +static int uvesafb_check_var(struct fb_var_screeninfo *var, + struct fb_info *info) +{ + struct uvesafb_par *par = info->par; + struct vbe_mode_ib *mode = NULL; + int match = -1; + int depth = var->red.length + var->green.length + var->blue.length; + + /* + * Various apps will use bits_per_pixel to set the color depth, + * which is theoretically incorrect, but which we'll try to handle + * here. + */ + if (depth == 0 || abs(depth - var->bits_per_pixel) >= 8) + depth = var->bits_per_pixel; + + match = uvesafb_vbe_find_mode(par, var->xres, var->yres, depth, + UVESAFB_EXACT_RES); + if (match == -1) + return -EINVAL; + + mode = &par->vbe_modes[match]; + uvesafb_setup_var(var, info, mode); + + /* + * Check whether we have remapped enough memory for this mode. + * We might be called at an early stage, when we haven't remapped + * any memory yet, in which case we simply skip the check. + */ + if (var->yres * mode->bytes_per_scan_line > info->fix.smem_len + && info->fix.smem_len) + return -EINVAL; + + if ((var->vmode & FB_VMODE_DOUBLE) && + !(par->vbe_modes[match].mode_attr & 0x100)) + var->vmode &= ~FB_VMODE_DOUBLE; + + if ((var->vmode & FB_VMODE_INTERLACED) && + !(par->vbe_modes[match].mode_attr & 0x200)) + var->vmode &= ~FB_VMODE_INTERLACED; + + uvesafb_check_limits(var, info); + + var->xres_virtual = var->xres; + var->yres_virtual = (par->ypan) ? + info->fix.smem_len / mode->bytes_per_scan_line : + var->yres; + return 0; +} + +static struct fb_ops uvesafb_ops = { + .owner = THIS_MODULE, + .fb_open = uvesafb_open, + .fb_release = uvesafb_release, + .fb_setcolreg = uvesafb_setcolreg, + .fb_setcmap = uvesafb_setcmap, + .fb_pan_display = uvesafb_pan_display, + .fb_blank = uvesafb_blank, + .fb_fillrect = cfb_fillrect, + .fb_copyarea = cfb_copyarea, + .fb_imageblit = cfb_imageblit, + .fb_check_var = uvesafb_check_var, + .fb_set_par = uvesafb_set_par, +}; + +static void uvesafb_init_info(struct fb_info *info, struct vbe_mode_ib *mode) +{ + unsigned int size_vmode; + unsigned int size_remap; + unsigned int size_total; + struct uvesafb_par *par = info->par; + int i, h; + + info->pseudo_palette = ((u8 *)info->par + sizeof(struct uvesafb_par)); + info->fix = uvesafb_fix; + info->fix.ypanstep = par->ypan ? 1 : 0; + info->fix.ywrapstep = (par->ypan > 1) ? 1 : 0; + + /* Disable blanking if the user requested so. */ + if (!blank) + uvesafb_ops.fb_blank = NULL; + + /* + * Find out how much IO memory is required for the mode with + * the highest resolution. + */ + size_remap = 0; + for (i = 0; i < par->vbe_modes_cnt; i++) { + h = par->vbe_modes[i].bytes_per_scan_line * + par->vbe_modes[i].y_res; + if (h > size_remap) + size_remap = h; + } + size_remap *= 2; + + /* + * size_vmode -- that is the amount of memory needed for the + * used video mode, i.e. the minimum amount of + * memory we need. + */ + size_vmode = info->var.yres * mode->bytes_per_scan_line; + + /* + * size_total -- all video memory we have. Used for mtrr + * entries, resource allocation and bounds + * checking. + */ + size_total = par->vbe_ib.total_memory * 65536; + if (vram_total) + size_total = vram_total * 1024 * 1024; + if (size_total < size_vmode) + size_total = size_vmode; + + /* + * size_remap -- the amount of video memory we are going to + * use for vesafb. With modern cards it is no + * option to simply use size_total as th + * wastes plenty of kernel address space. + */ + if (vram_remap) + size_remap = vram_remap * 1024 * 1024; + if (size_remap < size_vmode) + size_remap = size_vmode; + if (size_remap > size_total) + size_remap = size_total; + + info->fix.smem_len = size_remap; + info->fix.smem_start = mode->phys_base_ptr; + + /* + * We have to set yres_virtual here because when setup_var() was + * called, smem_len wasn't defined yet. + */ + info->var.yres_virtual = info->fix.smem_len / + mode->bytes_per_scan_line; + + if (par->ypan && info->var.yres_virtual > info->var.yres) { + pr_info("scrolling: %s using protected mode interface, yres_virtual=%d\n", + (par->ypan > 1) ? "ywrap" : "ypan", + info->var.yres_virtual); + } else { + pr_info("scrolling: redraw\n"); + info->var.yres_virtual = info->var.yres; + par->ypan = 0; + } + + info->flags = FBINFO_FLAG_DEFAULT | + (par->ypan ? FBINFO_HWACCEL_YPAN : 0); + + if (!par->ypan) + uvesafb_ops.fb_pan_display = NULL; +} + +static void uvesafb_init_mtrr(struct fb_info *info) +{ + struct uvesafb_par *par = info->par; + + if (mtrr && !(info->fix.smem_start & (PAGE_SIZE - 1))) { + int temp_size = info->fix.smem_len; + + int rc; + + /* Find the largest power-of-two */ + temp_size = roundup_pow_of_two(temp_size); + + /* Try and find a power of two to add */ + do { + rc = arch_phys_wc_add(info->fix.smem_start, temp_size); + temp_size >>= 1; + } while (temp_size >= PAGE_SIZE && rc == -EINVAL); + + if (rc >= 0) + par->mtrr_handle = rc; + } +} + +static void uvesafb_ioremap(struct fb_info *info) +{ + info->screen_base = ioremap_wc(info->fix.smem_start, info->fix.smem_len); +} + +static ssize_t uvesafb_show_vbe_ver(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct fb_info *info = dev_get_drvdata(dev); + struct uvesafb_par *par = info->par; + + return snprintf(buf, PAGE_SIZE, "%.4x\n", par->vbe_ib.vbe_version); +} + +static DEVICE_ATTR(vbe_version, S_IRUGO, uvesafb_show_vbe_ver, NULL); + +static ssize_t uvesafb_show_vbe_modes(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct fb_info *info = dev_get_drvdata(dev); + struct uvesafb_par *par = info->par; + int ret = 0, i; + + for (i = 0; i < par->vbe_modes_cnt && ret < PAGE_SIZE; i++) { + ret += scnprintf(buf + ret, PAGE_SIZE - ret, + "%dx%d-%d, 0x%.4x\n", + par->vbe_modes[i].x_res, par->vbe_modes[i].y_res, + par->vbe_modes[i].depth, par->vbe_modes[i].mode_id); + } + + return ret; +} + +static DEVICE_ATTR(vbe_modes, S_IRUGO, uvesafb_show_vbe_modes, NULL); + +static ssize_t uvesafb_show_vendor(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct fb_info *info = dev_get_drvdata(dev); + struct uvesafb_par *par = info->par; + + if (par->vbe_ib.oem_vendor_name_ptr) + return snprintf(buf, PAGE_SIZE, "%s\n", (char *) + (&par->vbe_ib) + par->vbe_ib.oem_vendor_name_ptr); + else + return 0; +} + +static DEVICE_ATTR(oem_vendor, S_IRUGO, uvesafb_show_vendor, NULL); + +static ssize_t uvesafb_show_product_name(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct fb_info *info = dev_get_drvdata(dev); + struct uvesafb_par *par = info->par; + + if (par->vbe_ib.oem_product_name_ptr) + return snprintf(buf, PAGE_SIZE, "%s\n", (char *) + (&par->vbe_ib) + par->vbe_ib.oem_product_name_ptr); + else + return 0; +} + +static DEVICE_ATTR(oem_product_name, S_IRUGO, uvesafb_show_product_name, NULL); + +static ssize_t uvesafb_show_product_rev(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct fb_info *info = dev_get_drvdata(dev); + struct uvesafb_par *par = info->par; + + if (par->vbe_ib.oem_product_rev_ptr) + return snprintf(buf, PAGE_SIZE, "%s\n", (char *) + (&par->vbe_ib) + par->vbe_ib.oem_product_rev_ptr); + else + return 0; +} + +static DEVICE_ATTR(oem_product_rev, S_IRUGO, uvesafb_show_product_rev, NULL); + +static ssize_t uvesafb_show_oem_string(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct fb_info *info = dev_get_drvdata(dev); + struct uvesafb_par *par = info->par; + + if (par->vbe_ib.oem_string_ptr) + return snprintf(buf, PAGE_SIZE, "%s\n", + (char *)(&par->vbe_ib) + par->vbe_ib.oem_string_ptr); + else + return 0; +} + +static DEVICE_ATTR(oem_string, S_IRUGO, uvesafb_show_oem_string, NULL); + +static ssize_t uvesafb_show_nocrtc(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct fb_info *info = dev_get_drvdata(dev); + struct uvesafb_par *par = info->par; + + return snprintf(buf, PAGE_SIZE, "%d\n", par->nocrtc); +} + +static ssize_t uvesafb_store_nocrtc(struct device *dev, + struct device_attribute *attr, const char *buf, size_t count) +{ + struct fb_info *info = dev_get_drvdata(dev); + struct uvesafb_par *par = info->par; + + if (count > 0) { + if (buf[0] == '0') + par->nocrtc = 0; + else + par->nocrtc = 1; + } + return count; +} + +static DEVICE_ATTR(nocrtc, S_IRUGO | S_IWUSR, uvesafb_show_nocrtc, + uvesafb_store_nocrtc); + +static struct attribute *uvesafb_dev_attrs[] = { + &dev_attr_vbe_version.attr, + &dev_attr_vbe_modes.attr, + &dev_attr_oem_vendor.attr, + &dev_attr_oem_product_name.attr, + &dev_attr_oem_product_rev.attr, + &dev_attr_oem_string.attr, + &dev_attr_nocrtc.attr, + NULL, +}; + +static const struct attribute_group uvesafb_dev_attgrp = { + .name = NULL, + .attrs = uvesafb_dev_attrs, +}; + +static int uvesafb_probe(struct platform_device *dev) +{ + struct fb_info *info; + struct vbe_mode_ib *mode = NULL; + struct uvesafb_par *par; + int err = 0, i; + + info = framebuffer_alloc(sizeof(*par) + sizeof(u32) * 256, &dev->dev); + if (!info) + return -ENOMEM; + + par = info->par; + + err = uvesafb_vbe_init(info); + if (err) { + pr_err("vbe_init() failed with %d\n", err); + goto out; + } + + info->fbops = &uvesafb_ops; + + i = uvesafb_vbe_init_mode(info); + if (i < 0) { + err = -EINVAL; + goto out; + } else { + mode = &par->vbe_modes[i]; + } + + if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) { + err = -ENXIO; + goto out; + } + + uvesafb_init_info(info, mode); + + if (!request_region(0x3c0, 32, "uvesafb")) { + pr_err("request region 0x3c0-0x3e0 failed\n"); + err = -EIO; + goto out_mode; + } + + if (!request_mem_region(info->fix.smem_start, info->fix.smem_len, + "uvesafb")) { + pr_err("cannot reserve video memory at 0x%lx\n", + info->fix.smem_start); + err = -EIO; + goto out_reg; + } + + uvesafb_init_mtrr(info); + uvesafb_ioremap(info); + + if (!info->screen_base) { + pr_err("abort, cannot ioremap 0x%x bytes of video memory at 0x%lx\n", + info->fix.smem_len, info->fix.smem_start); + err = -EIO; + goto out_mem; + } + + platform_set_drvdata(dev, info); + + if (register_framebuffer(info) < 0) { + pr_err("failed to register framebuffer device\n"); + err = -EINVAL; + goto out_unmap; + } + + pr_info("framebuffer at 0x%lx, mapped to 0x%p, using %dk, total %dk\n", + info->fix.smem_start, info->screen_base, + info->fix.smem_len / 1024, par->vbe_ib.total_memory * 64); + fb_info(info, "%s frame buffer device\n", info->fix.id); + + err = sysfs_create_group(&dev->dev.kobj, &uvesafb_dev_attgrp); + if (err != 0) + fb_warn(info, "failed to register attributes\n"); + + return 0; + +out_unmap: + iounmap(info->screen_base); +out_mem: + arch_phys_wc_del(par->mtrr_handle); + release_mem_region(info->fix.smem_start, info->fix.smem_len); +out_reg: + release_region(0x3c0, 32); +out_mode: + if (!list_empty(&info->modelist)) + fb_destroy_modelist(&info->modelist); + fb_destroy_modedb(info->monspecs.modedb); + fb_dealloc_cmap(&info->cmap); +out: + kfree(par->vbe_modes); + + framebuffer_release(info); + return err; +} + +static int uvesafb_remove(struct platform_device *dev) +{ + struct fb_info *info = platform_get_drvdata(dev); + + if (info) { + struct uvesafb_par *par = info->par; + + sysfs_remove_group(&dev->dev.kobj, &uvesafb_dev_attgrp); + unregister_framebuffer(info); + release_region(0x3c0, 32); + iounmap(info->screen_base); + arch_phys_wc_del(par->mtrr_handle); + release_mem_region(info->fix.smem_start, info->fix.smem_len); + fb_destroy_modedb(info->monspecs.modedb); + fb_dealloc_cmap(&info->cmap); + + kfree(par->vbe_modes); + kfree(par->vbe_state_orig); + kfree(par->vbe_state_saved); + + framebuffer_release(info); + } + return 0; +} + +static struct platform_driver uvesafb_driver = { + .probe = uvesafb_probe, + .remove = uvesafb_remove, + .driver = { + .name = "uvesafb", + }, +}; + +static struct platform_device *uvesafb_device; + +#ifndef MODULE +static int uvesafb_setup(char *options) +{ + char *this_opt; + + if (!options || !*options) + return 0; + + while ((this_opt = strsep(&options, ",")) != NULL) { + if (!*this_opt) continue; + + if (!strcmp(this_opt, "redraw")) + ypan = 0; + else if (!strcmp(this_opt, "ypan")) + ypan = 1; + else if (!strcmp(this_opt, "ywrap")) + ypan = 2; + else if (!strcmp(this_opt, "vgapal")) + pmi_setpal = false; + else if (!strcmp(this_opt, "pmipal")) + pmi_setpal = true; + else if (!strncmp(this_opt, "mtrr:", 5)) + mtrr = simple_strtoul(this_opt+5, NULL, 0); + else if (!strcmp(this_opt, "nomtrr")) + mtrr = 0; + else if (!strcmp(this_opt, "nocrtc")) + nocrtc = true; + else if (!strcmp(this_opt, "noedid")) + noedid = true; + else if (!strcmp(this_opt, "noblank")) + blank = false; + else if (!strncmp(this_opt, "vtotal:", 7)) + vram_total = simple_strtoul(this_opt + 7, NULL, 0); + else if (!strncmp(this_opt, "vremap:", 7)) + vram_remap = simple_strtoul(this_opt + 7, NULL, 0); + else if (!strncmp(this_opt, "maxhf:", 6)) + maxhf = simple_strtoul(this_opt + 6, NULL, 0); + else if (!strncmp(this_opt, "maxvf:", 6)) + maxvf = simple_strtoul(this_opt + 6, NULL, 0); + else if (!strncmp(this_opt, "maxclk:", 7)) + maxclk = simple_strtoul(this_opt + 7, NULL, 0); + else if (!strncmp(this_opt, "vbemode:", 8)) + vbemode = simple_strtoul(this_opt + 8, NULL, 0); + else if (this_opt[0] >= '0' && this_opt[0] <= '9') { + mode_option = this_opt; + } else { + pr_warn("unrecognized option %s\n", this_opt); + } + } + + if (mtrr != 3 && mtrr != 0) + pr_warn("uvesafb: mtrr should be set to 0 or 3; %d is unsupported", mtrr); + + return 0; +} +#endif /* !MODULE */ + +static ssize_t v86d_show(struct device_driver *dev, char *buf) +{ + return snprintf(buf, PAGE_SIZE, "%s\n", v86d_path); +} + +static ssize_t v86d_store(struct device_driver *dev, const char *buf, + size_t count) +{ + strncpy(v86d_path, buf, PATH_MAX); + return count; +} +static DRIVER_ATTR_RW(v86d); + +static int uvesafb_init(void) +{ + int err; + +#ifndef MODULE + char *option = NULL; + + if (fb_get_options("uvesafb", &option)) + return -ENODEV; + uvesafb_setup(option); +#endif + err = cn_add_callback(&uvesafb_cn_id, "uvesafb", uvesafb_cn_callback); + if (err) + return err; + + err = platform_driver_register(&uvesafb_driver); + + if (!err) { + uvesafb_device = platform_device_alloc("uvesafb", 0); + if (uvesafb_device) + err = platform_device_add(uvesafb_device); + else + err = -ENOMEM; + + if (err) { + platform_device_put(uvesafb_device); + platform_driver_unregister(&uvesafb_driver); + cn_del_callback(&uvesafb_cn_id); + return err; + } + + err = driver_create_file(&uvesafb_driver.driver, + &driver_attr_v86d); + if (err) { + pr_warn("failed to register attributes\n"); + err = 0; + } + } + return err; +} + +module_init(uvesafb_init); + +static void uvesafb_exit(void) +{ + struct uvesafb_ktask *task; + + if (v86d_started) { + task = uvesafb_prep(); + if (task) { + task->t.flags = TF_EXIT; + uvesafb_exec(task); + uvesafb_free(task); + } + } + + driver_remove_file(&uvesafb_driver.driver, &driver_attr_v86d); + platform_device_unregister(uvesafb_device); + platform_driver_unregister(&uvesafb_driver); + cn_del_callback(&uvesafb_cn_id); +} + +module_exit(uvesafb_exit); + +static int param_set_scroll(const char *val, const struct kernel_param *kp) +{ + ypan = 0; + + if (!strcmp(val, "redraw")) + ypan = 0; + else if (!strcmp(val, "ypan")) + ypan = 1; + else if (!strcmp(val, "ywrap")) + ypan = 2; + else + return -EINVAL; + + return 0; +} +static const struct kernel_param_ops param_ops_scroll = { + .set = param_set_scroll, +}; +#define param_check_scroll(name, p) __param_check(name, p, void) + +module_param_named(scroll, ypan, scroll, 0); +MODULE_PARM_DESC(scroll, + "Scrolling mode, set to 'redraw', 'ypan', or 'ywrap'"); +module_param_named(vgapal, pmi_setpal, invbool, 0); +MODULE_PARM_DESC(vgapal, "Set palette using VGA registers"); +module_param_named(pmipal, pmi_setpal, bool, 0); +MODULE_PARM_DESC(pmipal, "Set palette using PMI calls"); +module_param(mtrr, uint, 0); +MODULE_PARM_DESC(mtrr, + "Memory Type Range Registers setting. Use 0 to disable."); +module_param(blank, bool, 0); +MODULE_PARM_DESC(blank, "Enable hardware blanking"); +module_param(nocrtc, bool, 0); +MODULE_PARM_DESC(nocrtc, "Ignore CRTC timings when setting modes"); +module_param(noedid, bool, 0); +MODULE_PARM_DESC(noedid, + "Ignore EDID-provided monitor limits when setting modes"); +module_param(vram_remap, uint, 0); +MODULE_PARM_DESC(vram_remap, "Set amount of video memory to be used [MiB]"); +module_param(vram_total, uint, 0); +MODULE_PARM_DESC(vram_total, "Set total amount of video memory [MiB]"); +module_param(maxclk, ushort, 0); +MODULE_PARM_DESC(maxclk, "Maximum pixelclock [MHz], overrides EDID data"); +module_param(maxhf, ushort, 0); +MODULE_PARM_DESC(maxhf, + "Maximum horizontal frequency [kHz], overrides EDID data"); +module_param(maxvf, ushort, 0); +MODULE_PARM_DESC(maxvf, + "Maximum vertical frequency [Hz], overrides EDID data"); +module_param(mode_option, charp, 0); +MODULE_PARM_DESC(mode_option, + "Specify initial video mode as \"<xres>x<yres>[-<bpp>][@<refresh>]\""); +module_param(vbemode, ushort, 0); +MODULE_PARM_DESC(vbemode, + "VBE mode number to set, overrides the 'mode' option"); +module_param_string(v86d, v86d_path, PATH_MAX, 0660); +MODULE_PARM_DESC(v86d, "Path to the v86d userspace helper."); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Michal Januszewski <spock@gentoo.org>"); +MODULE_DESCRIPTION("Framebuffer driver for VBE2.0+ compliant graphics boards"); + |