+/*
+ * linux/drivers/video/metronomefb.c -- FB driver for Metronome controller
+ *
+ * Copyright (C) 2008, Jaya Kumar
+ *
+ * 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.
+ *
+ * Layout is based on skeletonfb.c by James Simmons and Geert Uytterhoeven.
+ *
+ * This work was made possible by help and equipment support from E-Ink
+ * Corporation. http://support.eink.com/community
+ *
+ * This driver is written to be used with the Metronome display controller.
+ * It is intended to be architecture independent. A board specific driver
+ * must be used to perform all the physical IO interactions. An example
+ * is provided as am200epd.c
+ *
+ */
+
+#define DEBUG
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/fb.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/list.h>
+#include <linux/firmware.h>
+#include <linux/dma-mapping.h>
+#include <linux/uaccess.h>
+#include <linux/irq.h>
+#include <linux/ctype.h>
+
+#include <video/metronomefb.h>
+
+#include <asm/unaligned.h>
+
+/* Display specific information */
+#define DPY_W 832
+#define DPY_H 622
+
+#define WF_MODE_INIT 0 /* Initialization */
+#define WF_MODE_MU 1 /* Monochrome update */
+#define WF_MODE_GU 2 /* Grayscale update */
+#define WF_MODE_GC 3 /* Grayscale clearing */
+
+static int temp = 25;
+
+/* frame differs from image. frame includes non-visible pixels */
+struct epd_frame {
+ int fw; /* frame width */
+ int fh; /* frame height */
+ u16 config[4];
+ int wfm_size;
+};
+
+static struct epd_frame epd_frame_table[] = {
+ {
+ .fw = 832,
+ .fh = 622,
+ .config = {
+ 15 /* sdlew */
+ | 2 << 8 /* sdosz */
+ | 0 << 11 /* sdor */
+ | 0 << 12 /* sdces */
+ | 0 << 15, /* sdcer */
+ 42 /* gdspl */
+ | 1 << 8 /* gdr1 */
+ | 1 << 9 /* sdshr */
+ | 0 << 15, /* gdspp */
+ 18 /* gdspw */
+ | 0 << 15, /* dispc */
+ 599 /* vdlc */
+ | 0 << 11 /* dsi */
+ | 0 << 12, /* dsic */
+ },
+ .wfm_size = 47001,
+ },
+ {
+ .fw = 1088,
+ .fh = 791,
+ .config = {
+ 0x0104,
+ 0x031f,
+ 0x0088,
+ 0x02ff,
+ },
+ .wfm_size = 46770,
+ },
+ {
+ .fw = 1200,
+ .fh = 842,
+ .config = {
+ 0x0101,
+ 0x030e,
+ 0x0012,
+ 0x0280,
+ },
+ .wfm_size = 46770,
+ },
+ {
+ .fw = 800,
+ .fh = 600,
+ .config = {
+ 15 /* sdlew */
+ | 2 << 8 /* sdosz */
+ | 0 << 11 /* sdor */
+ | 0 << 12 /* sdces */
+ | 0 << 15, /* sdcer */
+ 42 /* gdspl */
+ | 1 << 8 /* gdr1 */
+ | 1 << 9 /* sdshr */
+ | 0 << 15, /* gdspp */
+ 18 /* gdspw */
+ | 0 << 15, /* dispc */
+ 599 /* vdlc */
+ | 0 << 11 /* dsi */
+ | 0 << 12, /* dsic */
+ },
+ .wfm_size = 46901,
+ },
+};
+
+static const struct fb_fix_screeninfo metronomefb_fix __devinitdata = {
+ .id = "metronomefb",
+ .type = FB_TYPE_PACKED_PIXELS,
+ .visual = FB_VISUAL_STATIC_PSEUDOCOLOR,
+ .xpanstep = 0,
+ .ypanstep = 0,
+ .ywrapstep = 0,
+ .line_length = DPY_W,
+ .accel = FB_ACCEL_NONE,
+};
+
+static const struct fb_var_screeninfo metronomefb_var __devinitdata = {
+ .xres = DPY_W,
+ .yres = DPY_H,
+ .xres_virtual = DPY_W,
+ .yres_virtual = DPY_H,
+ .bits_per_pixel = 8,
+ .grayscale = 1,
+ .nonstd = 1,
+ .red = { 4, 3, 0 },
+ .green = { 0, 0, 0 },
+ .blue = { 0, 0, 0 },
+ .transp = { 0, 0, 0 },
+};
+
+/* the waveform structure that is coming from userspace firmware */
+struct waveform_hdr {
+ u8 stuff[32];
+
+ u8 wmta[3];
+ u8 fvsn;
+
+ u8 luts;
+ u8 mc;
+ u8 trc;
+ u8 stuff3;
+
+ u8 endb;
+ u8 swtb;
+ u8 stuff2a[2];
+
+ u8 stuff2b[3];
+ u8 wfm_cs;
+} __attribute__ ((packed));
+
+/* main metronomefb functions */
+static u8 calc_cksum(int start, int end, u8 *mem)
+{
+ u8 tmp = 0;
+ int i;
+
+ for (i = start; i < end; i++)
+ tmp += mem[i];
+
+ return tmp;
+}
+
+static u16 calc_img_cksum(u16 *start, int length)
+{
+ u16 tmp = 0;
+
+ while (length--)
+ tmp += *start++;
+
+ return tmp;
+}
+
+/* here we decode the incoming waveform file and populate metromem */
+static int load_waveform(u8 *mem, size_t size, int m, int t,
+ struct metronomefb_par *par)
+{
+ int tta;
+ int wmta;
+ int trn = 0;
+ int i;
+ unsigned char v;
+ u8 cksum;
+ int cksum_idx;
+ int wfm_idx, owfm_idx;
+ int mem_idx = 0;
+ struct waveform_hdr *wfm_hdr;
+ u8 *metromem = par->metromem_wfm;
+ struct device *dev = &par->pdev->dev;
+ u8 mc, trc;
+ u16 *p;
+ u16 img_cksum;
+
+ dev_dbg(dev, "Loading waveforms, mode %d, temperature %d\n", m, t);
+
+ wfm_hdr = (struct waveform_hdr *) mem;
+
+ if (wfm_hdr->fvsn != 1) {
+ dev_err(dev, "Error: bad fvsn %x\n", wfm_hdr->fvsn);
+ return -EINVAL;
+ }
+ if (wfm_hdr->luts != 0) {
+ dev_err(dev, "Error: bad luts %x\n", wfm_hdr->luts);
+ return -EINVAL;
+ }
+ cksum = calc_cksum(32, 47, mem);
+ if (cksum != wfm_hdr->wfm_cs) {
+ dev_err(dev, "Error: bad cksum %x != %x\n", cksum,
+ wfm_hdr->wfm_cs);
+ return -EINVAL;
+ }
+ mc = wfm_hdr->mc + 1;
+ trc = wfm_hdr->trc + 1;
+
+ for (i = 0; i < 5; i++) {
+ if (*(wfm_hdr->stuff2a + i) != 0) {
+ dev_err(dev, "Error: unexpected value in padding\n");
+ return -EINVAL;
+ }
+ }
+
+ /* calculating trn. trn is something used to index into
+ the waveform. presumably selecting the right one for the
+ desired temperature. it works out the offset of the first
+ v that exceeds the specified temperature */
+ if ((sizeof(*wfm_hdr) + trc) > size)
+ return -EINVAL;
+
+ for (i = sizeof(*wfm_hdr); i <= sizeof(*wfm_hdr) + trc; i++) {
+ if (mem[i] > t) {
+ trn = i - sizeof(*wfm_hdr) - 1;
+ break;
+ }
+ }
+
+ /* check temperature range table checksum */
+ cksum_idx = sizeof(*wfm_hdr) + trc + 1;
+ if (cksum_idx > size)
+ return -EINVAL;
+ cksum = calc_cksum(sizeof(*wfm_hdr), cksum_idx, mem);
+ if (cksum != mem[cksum_idx]) {
+ dev_err(dev, "Error: bad temperature range table cksum"
+ " %x != %x\n", cksum, mem[cksum_idx]);
+ return -EINVAL;
+ }
+
+ /* check waveform mode table address checksum */
+ wmta = get_unaligned_le32(wfm_hdr->wmta) & 0x00FFFFFF;
+ cksum_idx = wmta + m*4 + 3;
+ if (cksum_idx > size)
+ return -EINVAL;
+ cksum = calc_cksum(cksum_idx - 3, cksum_idx, mem);
+ if (cksum != mem[cksum_idx]) {
+ dev_err(dev, "Error: bad mode table address cksum"
+ " %x != %x\n", cksum, mem[cksum_idx]);
+ return -EINVAL;
+ }
+
+ /* check waveform temperature table address checksum */
+ tta = get_unaligned_le32(mem + wmta + m * 4) & 0x00FFFFFF;
+ cksum_idx = tta + trn*4 + 3;
+ if (cksum_idx > size)
+ return -EINVAL;
+ cksum = calc_cksum(cksum_idx - 3, cksum_idx, mem);
+ if (cksum != mem[cksum_idx]) {
+ dev_err(dev, "Error: bad temperature table address cksum"
+ " %x != %x\n", cksum, mem[cksum_idx]);
+ return -EINVAL;
+ }
+
+ /* here we do the real work of putting the waveform into the
+ metromem buffer. this does runlength decoding of the waveform */
+ wfm_idx = get_unaligned_le32(mem + tta + trn * 4) & 0x00FFFFFF;
+ owfm_idx = wfm_idx;
+ if (wfm_idx > size)
+ return -EINVAL;
+ while (wfm_idx < size) {
+ unsigned char rl;
+ v = mem[wfm_idx++];
+ if (v == wfm_hdr->swtb) {
+ while (((v = mem[wfm_idx++]) != wfm_hdr->swtb) &&
+ wfm_idx < size)
+ metromem[mem_idx++] = v;
+
+ continue;
+ }
+
+ if (v == wfm_hdr->endb)
+ break;
+
+ rl = mem[wfm_idx++];
+ for (i = 0; i <= rl; i++)
+ metromem[mem_idx++] = v;
+ }
+
+ cksum_idx = wfm_idx;
+ if (cksum_idx > size)
+ return -EINVAL;
+ dev_dbg(dev, "mem_idx = %u\n", mem_idx);
+ cksum = calc_cksum(owfm_idx, cksum_idx, mem);
+ if (cksum != mem[cksum_idx]) {
+ dev_err(dev, "Error: bad waveform data cksum"
+ " %x != %x\n", cksum, mem[cksum_idx]);
+ return -EINVAL;
+ }
+ par->frame_count = (mem_idx/64);
+
+ p = (u16 *)par->metromem_wfm;
+ img_cksum = calc_img_cksum(p, 16384 / 2);
+ p[16384 / 2] = __cpu_to_le16(img_cksum);
+
+ par->current_wf_mode = m;
+ par->current_wf_temp = t;
+
+ return 0;
+}
+
+static int check_err(struct metronomefb_par *par)
+{
+ int res;
+
+ res = par->board->get_err(par);
+ dev_dbg(&par->pdev->dev, "ERR = %d\n", res);
+ return res;
+}
+
+static inline int wait_for_rdy(struct metronomefb_par *par)
+{
+ int res = 0;
+
+ if (!par->board->get_rdy(par))
+ res = par->board->met_wait_event_intr(par);
+
+ return res;
+}
+
+static int metronome_display_cmd(struct metronomefb_par *par)
+{
+ int i;
+ u16 cs;
+ u16 opcode;
+ static u8 borderval;
+ int res;
+
+ res = wait_for_rdy(par);
+ if (res)
+ return res;
+
+ dev_dbg(&par->pdev->dev, "%s: ENTER\n", __func__);
+ /* setup display command
+ we can't immediately set the opcode since the controller
+ will try parse the command before we've set it all up
+ so we just set cs here and set the opcode at the end */
+
+ if (par->metromem_cmd->opcode == 0xCC40)
+ opcode = cs = 0xCC41;
+ else
+ opcode = cs = 0xCC40;
+
+ /* set the args ( 2 bytes ) for display */
+ i = 0;
+ par->metromem_cmd->args[i] = 0 << 3 /* border update */
+ | (3 << 4)
+// | ((borderval++ % 4) & 0x0F) << 4
+ | (par->frame_count - 1) << 8;
+ cs += par->metromem_cmd->args[i++];
+
+ /* the rest are 0 */
+ memset((u8 *) (par->metromem_cmd->args + i), 0, (32-i)*2);
+
+ par->metromem_cmd->csum = cs;
+ par->metromem_cmd->opcode = opcode; /* display cmd */
+
+ return 0;
+
+}
+
+static int __devinit metronome_powerup_cmd(struct metronomefb_par *par)
+{
+ int i;
+ u16 cs;
+ int res;
+
+ dev_dbg(&par->pdev->dev, "%s: ENTER\n", __func__);
+ /* setup power up command */
+ par->metromem_cmd->opcode = 0x1234; /* pwr up pseudo cmd */
+ cs = par->metromem_cmd->opcode;
+
+ /* set pwr1,2,3 to 1024 */
+ for (i = 0; i < 3; i++) {
+// par->metromem_cmd->args[i] = 1024;
+ par->metromem_cmd->args[i] = 100;
+ cs += par->metromem_cmd->args[i];
+ }
+
+ /* the rest are 0 */
+ memset((u8 *) (par->metromem_cmd->args + i), 0, (32-i)*2);
+
+ par->metromem_cmd->csum = cs;
+
+ msleep(1);
+ par->board->set_rst(par, 1);
+
+ msleep(1);
+ par->board->set_stdby(par, 1);
+
+ res = par->board->met_wait_event(par);
+ dev_dbg(&par->pdev->dev, "%s: EXIT: %d\n", __func__, res);
+ return res;
+}
+
+static int __devinit metronome_config_cmd(struct metronomefb_par *par)
+{
+ /* setup config command
+ we can't immediately set the opcode since the controller
+ will try parse the command before we've set it all up */
+
+ dev_dbg(&par->pdev->dev, "%s: ENTER\n", __func__);
+ memcpy(par->metromem_cmd->args, epd_frame_table[par->dt].config,
+ sizeof(epd_frame_table[par->dt].config));
+ /* the rest are 0 */
+ memset((u8 *) (par->metromem_cmd->args + 4), 0, (32-4)*2);
+
+ par->metromem_cmd->csum = 0xCC10;
+ par->metromem_cmd->csum += calc_img_cksum(par->metromem_cmd->args, 4);
+ par->metromem_cmd->opcode = 0xCC10; /* config cmd */
+
+ return par->board->met_wait_event(par);
+}
+
+static int __devinit metronome_init_cmd(struct metronomefb_par *par)
+{
+ int i;
+ u16 cs;
+
+ /* setup init command
+ we can't immediately set the opcode since the controller
+ will try parse the command before we've set it all up
+ so we just set cs here and set the opcode at the end */
+
+ dev_dbg(&par->pdev->dev, "%s: ENTER\n", __func__);
+ cs = 0xCC20;
+
+ /* set the args ( 2 bytes ) for init */
+ i = 0;
+ par->metromem_cmd->args[i] = 0x0007;
+ cs += par->metromem_cmd->args[i++];
+
+ /* the rest are 0 */
+ memset((u8 *) (par->metromem_cmd->args + i), 0, (32-i)*2);
+
+ par->metromem_cmd->csum = cs;
+ par->metromem_cmd->opcode = 0xCC20; /* init cmd */
+
+ return par->board->met_wait_event(par);
+}
+
+static int metronome_bootup(struct metronomefb_par *par)
+{
+ int res;
+
+ res = metronome_powerup_cmd(par);
+ if (res) {
+ dev_err(&par->pdev->dev, "metronomefb: POWERUP cmd failed\n");
+ goto finish;
+ }
+
+ check_err(par);
+ res = metronome_config_cmd(par);
+ if (res) {
+ dev_err(&par->pdev->dev, "metronomefb: CONFIG cmd failed\n");
+ goto finish;
+ }
+ check_err(par);
+
+ res = metronome_init_cmd(par);
+ if (res)
+ dev_err(&par->pdev->dev, "metronomefb: INIT cmd failed\n");
+ check_err(par);
+
+finish:
+ return res;
+}
+
+static int __devinit metronome_init_regs(struct metronomefb_par *par)
+{
+ int res;
+
+ if (par->board->power_ctl)
+ par->board->power_ctl(par, METRONOME_POWER_ON);
+
+ res = metronome_bootup(par);
+
+ return res;
+}
+
+static void metronomefb_dpy_update(struct metronomefb_par *par, int clear_all)
+{
+ int x, y;
+ int i;
+ u16 cksum = 0;
+ u32 *buf = (u32 __force *)par->info->screen_base;
+ u32 *img = (u32 *)(par->metromem_img);
+ u32 diff;
+ u32 tmp;
+ unsigned int fbsize = par->info->fix.smem_len;
+ int fx = par->info->fix.line_length;
+ int fy = fbsize / fx;
+ int fx_buf = fx / sizeof(*buf);
+ int m;
+ static int is_first_update = 1;
+ static int partial_updates_count = 0;
+ u32 *fxbuckets = par->fxbuckets;
+ u32 *fybuckets = par->fybuckets;
+
+ wait_for_rdy(par);
+
+ memset(fxbuckets, 0, fx_buf * sizeof(*fxbuckets));
+ memset(fybuckets, 0, fy * sizeof(*fybuckets));
+
+ i = 0;
+ for (y = 0; y < fy; y++) {
+ for(x = 0; x < fx_buf; x++, i++) {
+ tmp = (buf[i] << 5) & 0xE0E0E0E0;
+ img[i] &= 0xF0F0F0F0;
+ diff = img[i] ^ tmp;
+
+ fxbuckets[x] |= diff;
+ fybuckets[y] |= diff;
+
+ img[i] = (img[i] >> 4) | tmp;
+ cksum += img[i] & 0x0000ffff;
+ cksum += (img[i] >> 16);
+ }
+ }
+
+ *((u16 *)(par->metromem_img) + fbsize/2) = cksum;
+
+ if (clear_all || is_first_update ||
+ (partial_updates_count == par->partial_autorefresh_interval)) {
+ m = WF_MODE_GC;
+ partial_updates_count = 0;
+ } else {
+ int min_x = fx_buf;
+ int max_x = 0;
+ int min_y = fy;
+ int max_y = 0;
+ int change_count;
+
+ for (x = 0; x < fx_buf; x++)
+ if(fxbuckets[x]) {
+ min_x = x;
+ break;
+ }
+
+ for (x = fx_buf - 1; x >= 0; x--)
+ if(fxbuckets[x]) {
+ max_x = x;
+ break;
+ }
+
+ for (y = 0; y < fy; y++)
+ if(fybuckets[y]) {
+ min_y = y;
+ break;
+ }
+
+ for (y = fy - 1; y >= 0; y--)
+ if(fybuckets[y]) {
+ max_y = y;
+ break;
+ }
+
+ if ((min_x > max_x) || (min_y > max_y))
+ change_count = 0;
+ else
+ change_count = (max_x - min_x + 1) * (max_y - min_y + 1) * sizeof(*buf);
+
+ if (change_count < fbsize / 100 * par->manual_refresh_threshold)
+ m = WF_MODE_GU;
+ else
+ m = WF_MODE_GC;
+
+ dev_dbg(&par->pdev->dev, "min_x = %d, max_x = %d, min_y = %d, max_y = %d\n",
+ min_x, max_x, min_y, max_y);
+ dev_dbg(&par->pdev->dev, "change_count = %u, treshold = %u%% (%u pixels)\n",
+ change_count, par->manual_refresh_threshold,
+ fbsize / 100 * par->manual_refresh_threshold);
+
+ partial_updates_count++;
+ }
+
+ if (m != par->current_wf_mode) {
+ load_waveform((u8 *) par->firmware->data, par->firmware->size,
+ m, par->current_wf_temp, par);
+ }
+
+ for(;;) {
+ if (likely(!check_err(par))) {
+ metronome_display_cmd(par);
+ break;
+ }
+
+ par->board->set_stdby(par, 0);
+ printk("Resetting Metronome\n");
+ par->board->set_rst(par, 0);
+ mdelay(1);
+ if (par->board->power_ctl)
+ par->board->power_ctl(par, METRONOME_POWER_OFF);
+
+ mdelay(1);
+ load_waveform((u8 *) par->firmware->data, par->firmware->size,
+ WF_MODE_GC, par->current_wf_temp, par);
+ if (par->board->power_ctl)
+ par->board->power_ctl(par, METRONOME_POWER_ON);
+ metronome_bootup(par);
+ }
+
+ is_first_update = 0;
+}
+
+/* this is called back from the deferred io workqueue */
+static void metronomefb_dpy_deferred_io(struct fb_info *info,
+ struct list_head *pagelist)
+{
+ struct metronomefb_par *par = info->par;
+
+ /* We will update entire display because we need to change
+ * 'previous image' field in pixels which was changed at
+ * previous refresh
+ */
+ mutex_lock(&par->lock);
+ metronomefb_dpy_update(par, 0);
+ mutex_unlock(&par->lock);
+}
+
+static void metronomefb_fillrect(struct fb_info *info,
+ const struct fb_fillrect *rect)
+{
+ struct metronomefb_par *par = info->par;
+
+ mutex_lock(&par->lock);
+ sys_fillrect(info, rect);
+ metronomefb_dpy_update(par, 0);
+ mutex_unlock(&par->lock);
+}
+
+static void metronomefb_copyarea(struct fb_info *info,
+ const struct fb_copyarea *area)
+{
+ struct metronomefb_par *par = info->par;
+
+ mutex_lock(&par->lock);
+ sys_copyarea(info, area);
+ metronomefb_dpy_update(par, 0);
+ mutex_unlock(&par->lock);
+}
+
+static void metronomefb_imageblit(struct fb_info *info,
+ const struct fb_image *image)
+{
+ struct metronomefb_par *par = info->par;
+
+ mutex_lock(&par->lock);
+ sys_imageblit(info, image);
+ metronomefb_dpy_update(par, 0);
+ mutex_unlock(&par->lock);
+}
+
+/*
+ * this is the slow path from userspace. they can seek and write to
+ * the fb. it is based on fb_sys_write
+ */
+static ssize_t metronomefb_write(struct fb_info *info, const char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ struct metronomefb_par *par = info->par;
+ unsigned long p = *ppos;
+ void *dst;
+ int err = 0;
+ unsigned long total_size;
+
+ if (info->state != FBINFO_STATE_RUNNING)
+ return -EPERM;
+
+ total_size = info->fix.smem_len;
+
+ if (p > total_size)
+ return -EFBIG;
+
+ if (count > total_size) {
+ err = -EFBIG;
+ count = total_size;
+ }
+
+ if (count + p > total_size) {
+ if (!err)
+ err = -ENOSPC;
+
+ count = total_size - p;
+ }
+
+ dst = (void __force *)(info->screen_base + p);
+
+ mutex_lock(&par->lock);
+
+ if (copy_from_user(dst, buf, count))
+ err = -EFAULT;
+
+ if (!err)
+ *ppos += count;
+
+ metronomefb_dpy_update(par, 0);
+ mutex_unlock(&par->lock);
+
+ return (err) ? err : count;
+}
+
+static struct fb_ops metronomefb_ops = {
+ .owner = THIS_MODULE,
+ .fb_write = metronomefb_write,
+ .fb_fillrect = metronomefb_fillrect,
+ .fb_copyarea = metronomefb_copyarea,
+ .fb_imageblit = metronomefb_imageblit,
+};
+
+static struct fb_deferred_io metronomefb_defio = {
+ .delay = HZ / 4,
+ .deferred_io = metronomefb_dpy_deferred_io,
+};
+
+static ssize_t metronomefb_defio_delay_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct fb_info *info = dev_get_drvdata(dev);
+
+ sprintf(buf, "%lu\n", info->fbdefio->delay * 1000 / HZ);
+ return strlen(buf) + 1;
+}
+
+static ssize_t metronomefb_defio_delay_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t size)
+{
+ struct fb_info *info = dev_get_drvdata(dev);
+ char *after;
+ unsigned long state = simple_strtoul(buf, &after, 10);
+ size_t count = after - buf;
+ ssize_t ret = -EINVAL;
+
+ if (*after && isspace(*after))
+ count++;
+
+ state = state * HZ / 1000;
+
+ if (!state)
+ state = 1;
+
+ if (count == size) {
+ ret = count;
+ info->fbdefio->delay = state;
+ }
+
+ return ret;
+}
+
+static ssize_t metronomefb_manual_refresh_thr_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct fb_info *info = dev_get_drvdata(dev);
+ struct metronomefb_par *par = info->par;
+
+ return sprintf(buf, "%u\n", par->manual_refresh_threshold);
+}
+
+static ssize_t metronomefb_manual_refresh_thr_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t size)
+{
+ struct fb_info *info = dev_get_drvdata(dev);
+ struct metronomefb_par *par = info->par;
+ char *after;
+ unsigned long val = simple_strtoul(buf, &after, 10);
+ size_t count = after - buf;
+ ssize_t ret = -EINVAL;
+
+ if (*after && isspace(*after))
+ count++;
+
+ if (val > 100)
+ return -EINVAL;
+
+
+ if (count == size) {
+ ret = count;
+ par->manual_refresh_threshold = val;
+ }
+
+ return ret;
+}
+
+static ssize_t metronomefb_autorefresh_interval_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct fb_info *info = dev_get_drvdata(dev);
+ struct metronomefb_par *par = info->par;
+
+ return sprintf(buf, "%u\n", par->partial_autorefresh_interval);
+}
+
+static ssize_t metronomefb_autorefresh_interval_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t size)
+{
+ struct fb_info *info = dev_get_drvdata(dev);
+ struct metronomefb_par *par = info->par;
+ char *after;
+ unsigned long val = simple_strtoul(buf, &after, 10);
+ size_t count = after - buf;
+ ssize_t ret = -EINVAL;
+
+ if (*after && isspace(*after))
+ count++;
+
+ if (val > 100)
+ return -EINVAL;
+
+
+ if (count == size) {
+ ret = count;
+ par->partial_autorefresh_interval = val;
+ }
+
+ return ret;
+}
+
+static ssize_t metronomefb_temp_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct fb_info *info = dev_get_drvdata(dev);
+ struct metronomefb_par *par = info->par;
+
+ return sprintf(buf, "%u\n", par->current_wf_temp);
+}
+
+static ssize_t metronomefb_temp_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t size)
+{
+ struct fb_info *info = dev_get_drvdata(dev);
+ struct metronomefb_par *par = info->par;
+ char *after;
+ unsigned long val = simple_strtoul(buf, &after, 10);
+ size_t count = after - buf;
+ ssize_t ret = -EINVAL;
+
+ if (*after && isspace(*after))
+ count++;
+
+ if (val > 100)
+ return -EINVAL;
+
+
+ if (count == size) {
+ ret = count;
+ if (val != par->current_wf_temp)
+ load_waveform((u8 *) par->firmware->data, par->firmware->size,
+ par->current_wf_mode, val, par);
+ }
+
+ return ret;
+}
+
+DEVICE_ATTR(defio_delay, 0644,
+ metronomefb_defio_delay_show, metronomefb_defio_delay_store);
+DEVICE_ATTR(manual_refresh_threshold, 0644,
+ metronomefb_manual_refresh_thr_show, metronomefb_manual_refresh_thr_store);
+DEVICE_ATTR(temp, 0644,
+ metronomefb_temp_show, metronomefb_temp_store);
+DEVICE_ATTR(autorefresh_interval, 0644,
+ metronomefb_autorefresh_interval_show, metronomefb_autorefresh_interval_store);
+
+
+static int __devinit metronomefb_probe(struct platform_device *dev)
+{
+ struct fb_info *info;
+ struct metronome_board *board;
+ int retval = -ENOMEM;
+ int videomemorysize;
+ unsigned char *videomemory;
+ struct metronomefb_par *par;
+ const struct firmware *fw_entry;
+ int i;
+ int panel_type;
+ int fw, fh;
+ int epd_dt_index;
+
+ /* pick up board specific routines */
+ board = dev->dev.platform_data;
+ if (!board)
+ return -EINVAL;
+
+ /* try to count device specific driver, if can't, platform recalls */
+ if (!try_module_get(board->owner))
+ return -ENODEV;
+
+ info = framebuffer_alloc(sizeof(struct metronomefb_par), &dev->dev);
+ if (!info)
+ goto err;
+
+ /* we have two blocks of memory.
+ info->screen_base which is vm, and is the fb used by apps.
+ par->metromem which is physically contiguous memory and
+ contains the display controller commands, waveform,
+ processed image data and padding. this is the data pulled
+ by the device's LCD controller and pushed to Metronome.
+ the metromem memory is allocated by the board driver and
+ is provided to us */
+
+ panel_type = board->get_panel_type();
+ switch (panel_type) {
+ case 5:
+ epd_dt_index = 3;
+ break;
+ case 6:
+ epd_dt_index = 0;
+ break;
+ case 8:
+ epd_dt_index = 1;
+ break;
+ case 97:
+ epd_dt_index = 2;
+ break;
+ default:
+ dev_err(&dev->dev, "Unexpected panel type. Defaulting to 6\n");
+ epd_dt_index = 0;
+ break;
+ }
+
+ fw = epd_frame_table[epd_dt_index].fw;
+ fh = epd_frame_table[epd_dt_index].fh;
+
+ /* we need to add a spare page because our csum caching scheme walks
+ * to the end of the page */
+ videomemorysize = PAGE_SIZE + (fw * fh);
+ videomemory = vmalloc(videomemorysize);
+ if (!videomemory)
+ goto err_fb_rel;
+
+ memset(videomemory, 0xff, videomemorysize);
+
+ info->screen_base = (char __force __iomem *)videomemory;
+ info->fbops = &metronomefb_ops;
+
+ info->var = metronomefb_var;
+ info->var.xres = fw;
+ info->var.yres = fh;
+ info->var.xres_virtual = fw;
+ info->var.yres_virtual = fh;
+
+ info->fix = metronomefb_fix;
+ info->fix.smem_len = fw * fh; /* Real size of image area */
+ info->fix.line_length = fw;
+
+ par = info->par;
+ par->info = info;
+ par->board = board;
+ par->dt = epd_dt_index;
+ par->pdev = dev;
+
+ par->fxbuckets = kmalloc((fw / 4 + 1) * sizeof(*par->fxbuckets), GFP_KERNEL);
+ if (!par->fxbuckets)
+ goto err_vfree;
+
+ par->fybuckets = kmalloc(fh * sizeof(*par->fybuckets), GFP_KERNEL);
+ if (!par->fybuckets)
+ goto err_fxbuckets;
+
+ init_waitqueue_head(&par->waitq);
+ par->manual_refresh_threshold = 60;
+ par->partial_autorefresh_interval = 256;
+ mutex_init(&par->lock);
+
+ /* this table caches per page csum values. */
+ par->csum_table = vmalloc(videomemorysize/PAGE_SIZE);
+ if (!par->csum_table)
+ goto err_fybuckets;
+
+ /* the physical framebuffer that we use is setup by
+ * the platform device driver. It will provide us
+ * with cmd, wfm and image memory in a contiguous area. */
+ retval = board->setup_fb(par);
+ if (retval) {
+ dev_err(&dev->dev, "Failed to setup fb\n");
+ goto err_csum_table;
+ }
+
+ /* after this point we should have a framebuffer */
+ if ((!par->metromem_wfm) || (!par->metromem_img) ||
+ (!par->metromem_dma)) {
+ dev_err(&dev->dev, "fb access failure\n");
+ retval = -EINVAL;
+ goto err_csum_table;
+ }
+
+ info->fix.smem_start = 0;
+
+ /* load the waveform in. assume mode 3, temp 31 for now
+ a) request the waveform file from userspace
+ b) process waveform and decode into metromem */
+ retval = request_firmware(&fw_entry, "metronome.wbf", &dev->dev);
+ if (retval < 0) {
+ dev_err(&dev->dev, "Failed to get waveform\n");
+ goto err_csum_table;
+ }
+
+ retval = load_waveform((u8 *) fw_entry->data, fw_entry->size, WF_MODE_GC, temp,
+ par);
+ if (retval < 0) {
+ dev_err(&dev->dev, "Failed processing waveform\n");
+ goto err_csum_table;
+ }
+ par->firmware = fw_entry;
+
+ retval = board->setup_io(par);
+ if (retval) {
+ dev_err(&dev->dev, "metronomefb: setup_io() failed\n");
+ goto err_csum_table;
+ }
+
+ if (board->setup_irq(info))
+ goto err_csum_table;
+
+ retval = metronome_init_regs(par);
+ if (retval < 0)
+ goto err_free_irq;
+
+ info->flags = FBINFO_FLAG_DEFAULT;
+
+ info->fbdefio = &metronomefb_defio;
+ fb_deferred_io_init(info);
+
+ retval = fb_alloc_cmap(&info->cmap, 8, 0);
+ if (retval < 0) {
+ dev_err(&dev->dev, "Failed to allocate colormap\n");
+ goto err_free_irq;
+ }
+
+ /* set cmap */
+ for (i = 0; i < 8; i++)
+ info->cmap.red[i] = ((2 * i + 1)*(0xFFFF))/16;
+ memcpy(info->cmap.green, info->cmap.red, sizeof(u16)*8);
+ memcpy(info->cmap.blue, info->cmap.red, sizeof(u16)*8);
+
+ retval = register_framebuffer(info);
+ if (retval < 0)
+ goto err_cmap;
+
+ platform_set_drvdata(dev, info);
+
+ retval = device_create_file(info->dev, &dev_attr_defio_delay);
+ if (retval)
+ goto err_devattr_defio_delay;
+
+ retval = device_create_file(info->dev, &dev_attr_manual_refresh_threshold);
+ if (retval)
+ goto err_devattr_manual_refresh_thr;
+
+ retval = device_create_file(info->dev, &dev_attr_temp);
+ if (retval)
+ goto err_devattr_temp;
+
+ retval = device_create_file(info->dev, &dev_attr_autorefresh_interval);
+ if (retval)
+ goto err_devattr_autorefresh;
+
+ dev_info(&dev->dev,
+ "fb%d: Metronome frame buffer device, using %dK of video"
+ " memory\n", info->node, videomemorysize >> 10);
+
+ return 0;
+
+ device_remove_file(info->dev, &dev_attr_autorefresh_interval);
+err_devattr_autorefresh:
+ device_remove_file(info->dev, &dev_attr_temp);
+err_devattr_temp:
+ device_remove_file(info->dev, &dev_attr_manual_refresh_threshold);
+err_devattr_manual_refresh_thr:
+ device_remove_file(info->dev, &dev_attr_defio_delay);
+err_devattr_defio_delay:
+ unregister_framebuffer(info);
+err_cmap:
+ fb_dealloc_cmap(&info->cmap);
+err_free_irq:
+ board->cleanup(par);
+err_csum_table:
+ vfree(par->csum_table);
+err_fybuckets:
+ kfree(par->fybuckets);
+err_fxbuckets:
+ kfree(par->fxbuckets);
+err_vfree:
+ vfree(videomemory);
+err_fb_rel:
+ framebuffer_release(info);
+err:
+ module_put(board->owner);
+ return retval;
+}
+
+static int __devexit metronomefb_remove(struct platform_device *dev)
+{
+ struct fb_info *info = platform_get_drvdata(dev);
+
+ if (info) {
+ struct metronomefb_par *par = info->par;
+
+ par->board->set_stdby(par, 0);
+ mdelay(1);
+ if (par->board->power_ctl)
+ par->board->power_ctl(par, METRONOME_POWER_OFF);
+
+ device_remove_file(info->dev, &dev_attr_autorefresh_interval);
+ device_remove_file(info->dev, &dev_attr_temp);
+ device_remove_file(info->dev, &dev_attr_manual_refresh_threshold);
+ device_remove_file(info->dev, &dev_attr_defio_delay);
+ unregister_framebuffer(info);
+ fb_deferred_io_cleanup(info);
+ fb_dealloc_cmap(&info->cmap);
+ par->board->cleanup(par);
+ vfree(par->csum_table);
+ kfree(par->fybuckets);
+ kfree(par->fxbuckets);
+ vfree((void __force *)info->screen_base);
+ module_put(par->board->owner);
+ release_firmware(par->firmware);
+ dev_dbg(&dev->dev, "calling release\n");
+ framebuffer_release(info);
+ }
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int metronomefb_suspend(struct platform_device *pdev, pm_message_t message)
+{
+ struct fb_info *info = platform_get_drvdata(pdev);
+ struct metronomefb_par *par = info->par;
+
+ par->board->set_stdby(par, 0);
+ par->board->set_rst(par, 0);
+ if (par->board->power_ctl)
+ par->board->power_ctl(par, METRONOME_POWER_OFF);
+
+ return 0;
+}
+
+static int metronomefb_resume(struct platform_device *pdev)
+{
+ struct fb_info *info = platform_get_drvdata(pdev);
+ struct metronomefb_par *par = info->par;
+
+ if (par->board->power_ctl)
+ par->board->power_ctl(par, METRONOME_POWER_ON);
+
+ mutex_lock(&par->lock);
+ metronome_bootup(par);
+ mutex_unlock(&par->lock);
+
+ return 0;
+}
+
+#else
+#define metronomefb_suspend NULL
+#define metronomefb_resume NULL
+#endif
+
+
+static struct platform_driver metronomefb_driver = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "metronomefb",
+ },
+ .probe = metronomefb_probe,
+ .remove = __devexit_p(metronomefb_remove),
+ .suspend = metronomefb_suspend,
+ .resume = metronomefb_resume,
+};
+
+static int __init metronomefb_init(void)
+{
+ return platform_driver_register(&metronomefb_driver);
+}
+
+static void __exit metronomefb_exit(void)
+{
+ platform_driver_unregister(&metronomefb_driver);
+}
+
+module_param(temp, int, 0);
+MODULE_PARM_DESC(temp, "Set current temperature");
+
+module_init(metronomefb_init);
+module_exit(metronomefb_exit);
+
+MODULE_DESCRIPTION("fbdev driver for Metronome controller");
+MODULE_AUTHOR("Jaya Kumar");
+MODULE_LICENSE("GPL");
projects / openwrt / staging / wigyori.git / commitdiff