diff options
Diffstat (limited to 'drivers/video/omap/hwa742.c')
| -rw-r--r-- | drivers/video/omap/hwa742.c | 1077 |
1 files changed, 1077 insertions, 0 deletions
diff --git a/drivers/video/omap/hwa742.c b/drivers/video/omap/hwa742.c new file mode 100644 index 00000000000..dc48e02f215 --- /dev/null +++ b/drivers/video/omap/hwa742.c @@ -0,0 +1,1077 @@ +/* + * Epson HWA742 LCD controller driver + * + * Copyright (C) 2004-2005 Nokia Corporation + * Authors: Juha Yrjölä <juha.yrjola@nokia.com> + * Imre Deak <imre.deak@nokia.com> + * YUV support: Jussi Laako <jussi.laako@nokia.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + */ +#include <linux/module.h> +#include <linux/mm.h> +#include <linux/fb.h> +#include <linux/delay.h> +#include <linux/clk.h> + +#include <asm/arch/dma.h> +#include <asm/arch/omapfb.h> +#include <asm/arch/hwa742.h> + +#define HWA742_REV_CODE_REG 0x0 +#define HWA742_CONFIG_REG 0x2 +#define HWA742_PLL_DIV_REG 0x4 +#define HWA742_PLL_0_REG 0x6 +#define HWA742_PLL_1_REG 0x8 +#define HWA742_PLL_2_REG 0xa +#define HWA742_PLL_3_REG 0xc +#define HWA742_PLL_4_REG 0xe +#define HWA742_CLK_SRC_REG 0x12 +#define HWA742_PANEL_TYPE_REG 0x14 +#define HWA742_H_DISP_REG 0x16 +#define HWA742_H_NDP_REG 0x18 +#define HWA742_V_DISP_1_REG 0x1a +#define HWA742_V_DISP_2_REG 0x1c +#define HWA742_V_NDP_REG 0x1e +#define HWA742_HS_W_REG 0x20 +#define HWA742_HP_S_REG 0x22 +#define HWA742_VS_W_REG 0x24 +#define HWA742_VP_S_REG 0x26 +#define HWA742_PCLK_POL_REG 0x28 +#define HWA742_INPUT_MODE_REG 0x2a +#define HWA742_TRANSL_MODE_REG1 0x2e +#define HWA742_DISP_MODE_REG 0x34 +#define HWA742_WINDOW_TYPE 0x36 +#define HWA742_WINDOW_X_START_0 0x38 +#define HWA742_WINDOW_X_START_1 0x3a +#define HWA742_WINDOW_Y_START_0 0x3c +#define HWA742_WINDOW_Y_START_1 0x3e +#define HWA742_WINDOW_X_END_0 0x40 +#define HWA742_WINDOW_X_END_1 0x42 +#define HWA742_WINDOW_Y_END_0 0x44 +#define HWA742_WINDOW_Y_END_1 0x46 +#define HWA742_MEMORY_WRITE_LSB 0x48 +#define HWA742_MEMORY_WRITE_MSB 0x49 +#define HWA742_MEMORY_READ_0 0x4a +#define HWA742_MEMORY_READ_1 0x4c +#define HWA742_MEMORY_READ_2 0x4e +#define HWA742_POWER_SAVE 0x56 +#define HWA742_NDP_CTRL 0x58 + +#define HWA742_AUTO_UPDATE_TIME (HZ / 20) + +/* Reserve 4 request slots for requests in irq context */ +#define REQ_POOL_SIZE 24 +#define IRQ_REQ_POOL_SIZE 4 + +#define REQ_FROM_IRQ_POOL 0x01 + +#define REQ_COMPLETE 0 +#define REQ_PENDING 1 + +struct update_param { + int x, y, width, height; + int color_mode; + int flags; +}; + +struct hwa742_request { + struct list_head entry; + unsigned int flags; + + int (*handler)(struct hwa742_request *req); + void (*complete)(void *data); + void *complete_data; + + union { + struct update_param update; + struct completion *sync; + } par; +}; + +struct { + enum omapfb_update_mode update_mode; + enum omapfb_update_mode update_mode_before_suspend; + + struct timer_list auto_update_timer; + int stop_auto_update; + struct omapfb_update_window auto_update_window; + unsigned te_connected:1; + unsigned vsync_only:1; + + struct hwa742_request req_pool[REQ_POOL_SIZE]; + struct list_head pending_req_list; + struct list_head free_req_list; + struct semaphore req_sema; + spinlock_t req_lock; + + struct extif_timings reg_timings, lut_timings; + + int prev_color_mode; + int prev_flags; + int window_type; + + u32 max_transmit_size; + u32 extif_clk_period; + unsigned long pix_tx_time; + unsigned long line_upd_time; + + + struct omapfb_device *fbdev; + struct lcd_ctrl_extif *extif; + struct lcd_ctrl *int_ctrl; + + void (*power_up)(struct device *dev); + void (*power_down)(struct device *dev); +} hwa742; + +struct lcd_ctrl hwa742_ctrl; + +static u8 hwa742_read_reg(u8 reg) +{ + u8 data; + + hwa742.extif->set_bits_per_cycle(8); + hwa742.extif->write_command(®, 1); + hwa742.extif->read_data(&data, 1); + + return data; +} + +static void hwa742_write_reg(u8 reg, u8 data) +{ + hwa742.extif->set_bits_per_cycle(8); + hwa742.extif->write_command(®, 1); + hwa742.extif->write_data(&data, 1); +} + +static void set_window_regs(int x_start, int y_start, int x_end, int y_end) +{ + u8 tmp[8]; + u8 cmd; + + x_end--; + y_end--; + tmp[0] = x_start; + tmp[1] = x_start >> 8; + tmp[2] = y_start; + tmp[3] = y_start >> 8; + tmp[4] = x_end; + tmp[5] = x_end >> 8; + tmp[6] = y_end; + tmp[7] = y_end >> 8; + + hwa742.extif->set_bits_per_cycle(8); + cmd = HWA742_WINDOW_X_START_0; + + hwa742.extif->write_command(&cmd, 1); + + hwa742.extif->write_data(tmp, 8); +} + +static void set_format_regs(int conv, int transl, int flags) +{ + if (flags & OMAPFB_FORMAT_FLAG_DOUBLE) { + hwa742.window_type = ((hwa742.window_type & 0xfc) | 0x01); +#ifdef VERBOSE + dev_dbg(hwa742.fbdev->dev, "hwa742: enabled pixel doubling\n"); +#endif + } else { + hwa742.window_type = (hwa742.window_type & 0xfc); +#ifdef VERBOSE + dev_dbg(hwa742.fbdev->dev, "hwa742: disabled pixel doubling\n"); +#endif + } + + hwa742_write_reg(HWA742_INPUT_MODE_REG, conv); + hwa742_write_reg(HWA742_TRANSL_MODE_REG1, transl); + hwa742_write_reg(HWA742_WINDOW_TYPE, hwa742.window_type); +} + +static void enable_tearsync(int y, int width, int height, int screen_height, + int force_vsync) +{ + u8 b; + + b = hwa742_read_reg(HWA742_NDP_CTRL); + b |= 1 << 2; + hwa742_write_reg(HWA742_NDP_CTRL, b); + + if (likely(hwa742.vsync_only || force_vsync)) { + hwa742.extif->enable_tearsync(1, 0); + return; + } + + if (width * hwa742.pix_tx_time < hwa742.line_upd_time) { + hwa742.extif->enable_tearsync(1, 0); + return; + } + + if ((width * hwa742.pix_tx_time / 1000) * height < + (y + height) * (hwa742.line_upd_time / 1000)) { + hwa742.extif->enable_tearsync(1, 0); + return; + } + + hwa742.extif->enable_tearsync(1, y + 1); +} + +static void disable_tearsync(void) +{ + u8 b; + + hwa742.extif->enable_tearsync(0, 0); + + b = hwa742_read_reg(HWA742_NDP_CTRL); + b &= ~(1 << 2); + hwa742_write_reg(HWA742_NDP_CTRL, b); +} + +static inline struct hwa742_request *alloc_req(void) +{ + unsigned long flags; + struct hwa742_request *req; + int req_flags = 0; + + if (!in_interrupt()) + down(&hwa742.req_sema); + else + req_flags = REQ_FROM_IRQ_POOL; + + spin_lock_irqsave(&hwa742.req_lock, flags); + BUG_ON(list_empty(&hwa742.free_req_list)); + req = list_entry(hwa742.free_req_list.next, + struct hwa742_request, entry); + list_del(&req->entry); + spin_unlock_irqrestore(&hwa742.req_lock, flags); + + INIT_LIST_HEAD(&req->entry); + req->flags = req_flags; + + return req; +} + +static inline void free_req(struct hwa742_request *req) +{ + unsigned long flags; + + spin_lock_irqsave(&hwa742.req_lock, flags); + + list_del(&req->entry); + list_add(&req->entry, &hwa742.free_req_list); + if (!(req->flags & REQ_FROM_IRQ_POOL)) + up(&hwa742.req_sema); + + spin_unlock_irqrestore(&hwa742.req_lock, flags); +} + +static void process_pending_requests(void) +{ + unsigned long flags; + + spin_lock_irqsave(&hwa742.req_lock, flags); + + while (!list_empty(&hwa742.pending_req_list)) { + struct hwa742_request *req; + void (*complete)(void *); + void *complete_data; + + req = list_entry(hwa742.pending_req_list.next, + struct hwa742_request, entry); + spin_unlock_irqrestore(&hwa742.req_lock, flags); + + if (req->handler(req) == REQ_PENDING) + return; + + complete = req->complete; + complete_data = req->complete_data; + free_req(req); + + if (complete) + complete(complete_data); + + spin_lock_irqsave(&hwa742.req_lock, flags); + } + + spin_unlock_irqrestore(&hwa742.req_lock, flags); +} + +static void submit_req_list(struct list_head *head) +{ + unsigned long flags; + int process = 1; + + spin_lock_irqsave(&hwa742.req_lock, flags); + if (likely(!list_empty(&hwa742.pending_req_list))) + process = 0; + list_splice_init(head, hwa742.pending_req_list.prev); + spin_unlock_irqrestore(&hwa742.req_lock, flags); + + if (process) + process_pending_requests(); +} + +static void request_complete(void *data) +{ + struct hwa742_request *req = (struct hwa742_request *)data; + void (*complete)(void *); + void *complete_data; + + complete = req->complete; + complete_data = req->complete_data; + + free_req(req); + + if (complete) + complete(complete_data); + + process_pending_requests(); +} + +static int send_frame_handler(struct hwa742_request *req) +{ + struct update_param *par = &req->par.update; + int x = par->x; + int y = par->y; + int w = par->width; + int h = par->height; + int bpp; + int conv, transl; + unsigned long offset; + int color_mode = par->color_mode; + int flags = par->flags; + int scr_width = hwa742.fbdev->panel->x_res; + int scr_height = hwa742.fbdev->panel->y_res; + +#ifdef VERBOSE + dev_dbg(hwa742.fbdev->dev, "x %d y %d w %d h %d scr_width %d " + "color_mode %d flags %d\n", + x, y, w, h, scr_width, color_mode, flags); +#endif + + switch (color_mode) { + case OMAPFB_COLOR_YUV422: + bpp = 16; + conv = 0x08; + transl = 0x25; + break; + case OMAPFB_COLOR_YUV420: + bpp = 12; + conv = 0x09; + transl = 0x25; + break; + case OMAPFB_COLOR_RGB565: + bpp = 16; + conv = 0x01; + transl = 0x05; + break; + default: + return -EINVAL; + } + + if (hwa742.prev_flags != flags || + hwa742.prev_color_mode != color_mode) { + set_format_regs(conv, transl, flags); + hwa742.prev_color_mode = color_mode; + hwa742.prev_flags = flags; + } + flags = req->par.update.flags; + if (flags & OMAPFB_FORMAT_FLAG_TEARSYNC) + enable_tearsync(y, scr_width, h, scr_height, + flags & OMAPFB_FORMAT_FLAG_FORCE_VSYNC); + else + disable_tearsync(); + + set_window_regs(x, y, x + w, y + h); + + offset = (scr_width * y + x) * bpp / 8; + + hwa742.int_ctrl->setup_plane(OMAPFB_PLANE_GFX, + OMAPFB_CHANNEL_OUT_LCD, offset, scr_width, 0, 0, w, h, + color_mode); + + hwa742.extif->set_bits_per_cycle(16); + + hwa742.int_ctrl->enable_plane(OMAPFB_PLANE_GFX, 1); + hwa742.extif->transfer_area(w, h, request_complete, req); + + return REQ_PENDING; +} + +static void send_frame_complete(void *data) +{ + hwa742.int_ctrl->enable_plane(OMAPFB_PLANE_GFX, 0); +} + +#define ADD_PREQ(_x, _y, _w, _h) do { \ + req = alloc_req(); \ + req->handler = send_frame_handler; \ + req->complete = send_frame_complete; \ + req->par.update.x = _x; \ + req->par.update.y = _y; \ + req->par.update.width = _w; \ + req->par.update.height = _h; \ + req->par.update.color_mode = color_mode;\ + req->par.update.flags = flags; \ + list_add_tail(&req->entry, req_head); \ +} while(0) + +static void create_req_list(struct omapfb_update_window *win, + struct list_head *req_head) +{ + struct hwa742_request *req; + int x = win->x; + int y = win->y; + int width = win->width; + int height = win->height; + int color_mode; + int flags; + + flags = win->format & ~OMAPFB_FORMAT_MASK; + color_mode = win->format & OMAPFB_FORMAT_MASK; + + if (x & 1) { + ADD_PREQ(x, y, 1, height); + width--; + x++; + flags &= ~OMAPFB_FORMAT_FLAG_TEARSYNC; + } + if (width & ~1) { + unsigned int xspan = width & ~1; + unsigned int ystart = y; + unsigned int yspan = height; + + if (xspan * height * 2 > hwa742.max_transmit_size) { + yspan = hwa742.max_transmit_size / (xspan * 2); + ADD_PREQ(x, ystart, xspan, yspan); + ystart += yspan; + yspan = height - yspan; + flags &= ~OMAPFB_FORMAT_FLAG_TEARSYNC; + } + + ADD_PREQ(x, ystart, xspan, yspan); + x += xspan; + width -= xspan; + flags &= ~OMAPFB_FORMAT_FLAG_TEARSYNC; + } + if (width) + ADD_PREQ(x, y, 1, height); +} + +static void auto_update_complete(void *data) +{ + if (!hwa742.stop_auto_update) + mod_timer(&hwa742.auto_update_timer, + jiffies + HWA742_AUTO_UPDATE_TIME); +} + +static void hwa742_update_window_auto(unsigned long arg) +{ + LIST_HEAD(req_list); + struct hwa742_request *last; + + create_req_list(&hwa742.auto_update_window, &req_list); + last = list_entry(req_list.prev, struct hwa742_request, entry); + + last->complete = auto_update_complete; + last->complete_data = NULL; + + submit_req_list(&req_list); +} + +int hwa742_update_window_async(struct fb_info *fbi, + struct omapfb_update_window *win, + void (*complete_callback)(void *arg), + void *complete_callback_data) +{ + LIST_HEAD(req_list); + struct hwa742_request *last; + int r = 0; + + if (hwa742.update_mode != OMAPFB_MANUAL_UPDATE) { + dev_dbg(hwa742.fbdev->dev, "invalid update mode\n"); + r = -EINVAL; + goto out; + } + if (unlikely(win->format & + ~(0x03 | OMAPFB_FORMAT_FLAG_DOUBLE | + OMAPFB_FORMAT_FLAG_TEARSYNC | OMAPFB_FORMAT_FLAG_FORCE_VSYNC))) { + dev_dbg(hwa742.fbdev->dev, "invalid window flag"); + r = -EINVAL; + goto out; + } + + create_req_list(win, &req_list); + last = list_entry(req_list.prev, struct hwa742_request, entry); + + last->complete = complete_callback; + last->complete_data = (void *)complete_callback_data; + + submit_req_list(&req_list); + +out: + return r; +} +EXPORT_SYMBOL(hwa742_update_window_async); + +static int hwa742_setup_plane(int plane, int channel_out, + unsigned long offset, int screen_width, + int pos_x, int pos_y, int width, int height, + int color_mode) +{ + if (plane != OMAPFB_PLANE_GFX || + channel_out != OMAPFB_CHANNEL_OUT_LCD) + return -EINVAL; + + return 0; +} + +static int hwa742_enable_plane(int plane, int enable) +{ + if (plane != 0) + return -EINVAL; + + hwa742.int_ctrl->enable_plane(plane, enable); + + return 0; +} + +static int sync_handler(struct hwa742_request *req) +{ + complete(req->par.sync); + return REQ_COMPLETE; +} + +static void hwa742_sync(void) +{ + LIST_HEAD(req_list); + struct hwa742_request *req; + struct completion comp; + + req = alloc_req(); + + req->handler = sync_handler; + req->complete = NULL; + init_completion(&comp); + req->par.sync = ∁ + + list_add(&req->entry, &req_list); + submit_req_list(&req_list); + + wait_for_completion(&comp); +} + +static void hwa742_bind_client(struct omapfb_notifier_block *nb) +{ + dev_dbg(hwa742.fbdev->dev, "update_mode %d\n", hwa742.update_mode); + if (hwa742.update_mode == OMAPFB_MANUAL_UPDATE) { + omapfb_notify_clients(hwa742.fbdev, OMAPFB_EVENT_READY); + } +} + +static int hwa742_set_update_mode(enum omapfb_update_mode mode) +{ + if (mode != OMAPFB_MANUAL_UPDATE && mode != OMAPFB_AUTO_UPDATE && + mode != OMAPFB_UPDATE_DISABLED) + return -EINVAL; + + if (mode == hwa742.update_mode) + return 0; + + dev_info(hwa742.fbdev->dev, "HWA742: setting update mode to %s\n", + mode == OMAPFB_UPDATE_DISABLED ? "disabled" : + (mode == OMAPFB_AUTO_UPDATE ? "auto" : "manual")); + + switch (hwa742.update_mode) { + case OMAPFB_MANUAL_UPDATE: + omapfb_notify_clients(hwa742.fbdev, OMAPFB_EVENT_DISABLED); + break; + case OMAPFB_AUTO_UPDATE: + hwa742.stop_auto_update = 1; + del_timer_sync(&hwa742.auto_update_timer); + break; + case OMAPFB_UPDATE_DISABLED: + break; + } + + hwa742.update_mode = mode; + hwa742_sync(); + hwa742.stop_auto_update = 0; + + switch (mode) { + case OMAPFB_MANUAL_UPDATE: + omapfb_notify_clients(hwa742.fbdev, OMAPFB_EVENT_READY); + break; + case OMAPFB_AUTO_UPDATE: + hwa742_update_window_auto(0); + break; + case OMAPFB_UPDATE_DISABLED: + break; + } + + return 0; +} + +static enum omapfb_update_mode hwa742_get_update_mode(void) +{ + return hwa742.update_mode; +} + +static unsigned long round_to_extif_ticks(unsigned long ps, int div) +{ + int bus_tick = hwa742.extif_clk_period * div; + return (ps + bus_tick - 1) / bus_tick * bus_tick; +} + +static int calc_reg_timing(unsigned long sysclk, int div) +{ + struct extif_timings *t; + unsigned long systim; + + /* CSOnTime 0, WEOnTime 2 ns, REOnTime 2 ns, + * AccessTime 2 ns + 12.2 ns (regs), + * WEOffTime = WEOnTime + 1 ns, + * REOffTime = REOnTime + 16 ns (regs), + * CSOffTime = REOffTime + 1 ns + * ReadCycle = 2ns + 2*SYSCLK (regs), + * WriteCycle = 2*SYSCLK + 2 ns, + * CSPulseWidth = 10 ns */ + systim = 1000000000 / (sysclk / 1000); + dev_dbg(hwa742.fbdev->dev, "HWA742 systim %lu ps extif_clk_period %u ps" + "extif_clk_div %d\n", systim, hwa742.extif_clk_period, div); + + t = &hwa742.reg_timings; + memset(t, 0, sizeof(*t)); + t->clk_div = div; + t->cs_on_time = 0; + t->we_on_time = round_to_extif_ticks(t->cs_on_time + 2000, div); + t->re_on_time = round_to_extif_ticks(t->cs_on_time + 2000, div); + t->access_time = round_to_extif_ticks(t->re_on_time + 12200, div); + t->we_off_time = round_to_extif_ticks(t->we_on_time + 1000, div); + t->re_off_time = round_to_extif_ticks(t->re_on_time + 16000, div); + t->cs_off_time = round_to_extif_ticks(t->re_off_time + 1000, div); + t->we_cycle_time = round_to_extif_ticks(2 * systim + 2000, div); + if (t->we_cycle_time < t->we_off_time) + t->we_cycle_time = t->we_off_time; + t->re_cycle_time = round_to_extif_ticks(2 * systim + 2000, div); + if (t->re_cycle_time < t->re_off_time) + t->re_cycle_time = t->re_off_time; + t->cs_pulse_width = 0; + + dev_dbg(hwa742.fbdev->dev, "[reg]cson %d csoff %d reon %d reoff %d\n", + t->cs_on_time, t->cs_off_time, t->re_on_time, t->re_off_time); + dev_dbg(hwa742.fbdev->dev, "[reg]weon %d weoff %d recyc %d wecyc %d\n", + t->we_on_time, t->we_off_time, t->re_cycle_time, + t->we_cycle_time); + dev_dbg(hwa742.fbdev->dev, "[reg]rdaccess %d cspulse %d\n", + t->access_time, t->cs_pulse_width); + + return hwa742.extif->convert_timings(t); +} + +static int calc_lut_timing(unsigned long sysclk, int div) +{ + struct extif_timings *t; + unsigned long systim; + + /* CSOnTime 0, WEOnTime 2 ns, REOnTime 2 ns, + * AccessTime 2 ns + 4 * SYSCLK + 26 (lut), + * WEOffTime = WEOnTime + 1 ns, + * REOffTime = REOnTime + 4*SYSCLK + 26 ns (lut), + * CSOffTime = REOffTime + 1 ns + * ReadCycle = 2ns + 4*SYSCLK + 26 ns (lut), + * WriteCycle = 2*SYSCLK + 2 ns, + * CSPulseWidth = 10 ns + */ + systim = 1000000000 / (sysclk / 1000); + dev_dbg(hwa742.fbdev->dev, "HWA742 systim %lu ps extif_clk_period %u ps" + "extif_clk_div %d\n", systim, hwa742.extif_clk_period, div); + + t = &hwa742.lut_timings; + memset(t, 0, sizeof(*t)); + + t->clk_div = div; + + t->cs_on_time = 0; + t->we_on_time = round_to_extif_ticks(t->cs_on_time + 2000, div); + t->re_on_time = round_to_extif_ticks(t->cs_on_time + 2000, div); + t->access_time = round_to_extif_ticks(t->re_on_time + 4 * systim + + 26000, div); + t->we_off_time = round_to_extif_ticks(t->we_on_time + 1000, div); + t->re_off_time = round_to_extif_ticks(t->re_on_time + 4 * systim + + 26000, div); + t->cs_off_time = round_to_extif_ticks(t->re_off_time + 1000, div); + t->we_cycle_time = round_to_extif_ticks(2 * systim + 2000, div); + if (t->we_cycle_time < t->we_off_time) + t->we_cycle_time = t->we_off_time; + t->re_cycle_time = round_to_extif_ticks(2000 + 4 * systim + 26000, div); + if (t->re_cycle_time < t->re_off_time) + t->re_cycle_time = t->re_off_time; + t->cs_pulse_width = 0; + + dev_dbg(hwa742.fbdev->dev, "[lut]cson %d csoff %d reon %d reoff %d\n", + t->cs_on_time, t->cs_off_time, t->re_on_time, t->re_off_time); + dev_dbg(hwa742.fbdev->dev, "[lut]weon %d weoff %d recyc %d wecyc %d\n", + t->we_on_time, t->we_off_time, t->re_cycle_time, + t->we_cycle_time); + dev_dbg(hwa742.fbdev->dev, "[lut]rdaccess %d cspulse %d\n", + t->access_time, t->cs_pulse_width); + + return hwa742.extif->convert_timings(t); +} + +static int calc_extif_timings(unsigned long sysclk, int *extif_mem_div) +{ + int max_clk_div; + int div; + + hwa742.extif->get_clk_info(&hwa742.extif_clk_period, &max_clk_div); + for (div = 1; div < max_clk_div; div++) { + if (calc_reg_timing(sysclk, div) == 0) + break; + } + if (div > max_clk_div) + goto err; + + *extif_mem_div = div; + + for (div = 1; div < max_clk_div; div++) { + if (calc_lut_timing(sysclk, div) == 0) + break; + } + + if (div > max_clk_div) + goto err; + + return 0; + +err: + dev_err(hwa742.fbdev->dev, "can't setup timings\n"); + return -1; +} + +static void calc_hwa742_clk_rates(unsigned long ext_clk, + unsigned long *sys_clk, unsigned long *pix_clk) +{ + int pix_clk_src; + int sys_div = 0, sys_mul = 0; + int pix_div; + + pix_clk_src = hwa742_read_reg(HWA742_CLK_SRC_REG); + pix_div = ((pix_clk_src >> 3) & 0x1f) + 1; + if ((pix_clk_src & (0x3 << 1)) == 0) { + /* Source is the PLL */ + sys_div = (hwa742_read_reg(HWA742_PLL_DIV_REG) & 0x3f) + 1; + sys_mul = (hwa742_read_reg(HWA742_PLL_4_REG) & 0x7f) + 1; + *sys_clk = ext_clk * sys_mul / sys_div; + } else /* else source is ext clk, or oscillator */ + *sys_clk = ext_clk; + + *pix_clk = *sys_clk / pix_div; /* HZ */ + dev_dbg(hwa742.fbdev->dev, + "ext_clk %ld pix_src %d pix_div %d sys_div %d sys_mul %d\n", + ext_clk, pix_clk_src & (0x3 << 1), pix_div, sys_div, sys_mul); + dev_dbg(hwa742.fbdev->dev, "sys_clk %ld pix_clk %ld\n", + *sys_clk, *pix_clk); +} + + +static int setup_tearsync(unsigned long pix_clk, int extif_div) +{ + int hdisp, vdisp; + int hndp, vndp; + int hsw, vsw; + int hs, vs; + int hs_pol_inv, vs_pol_inv; + int use_hsvs, use_ndp; + u8 b; + + hsw = hwa742_read_reg(HWA742_HS_W_REG); + vsw = hwa742_read_reg(HWA742_VS_W_REG); + hs_pol_inv = !(hsw & 0x80); + vs_pol_inv = !(vsw & 0x80); + hsw = hsw & 0x7f; + vsw = vsw & 0x3f; + + hdisp = (hwa742_read_reg(HWA742_H_DISP_REG) & 0x7f) * 8; + vdisp = hwa742_read_reg(HWA742_V_DISP_1_REG) + + ((hwa742_read_reg(HWA742_V_DISP_2_REG) & 0x3) << 8); + + hndp = hwa742_read_reg(HWA742_H_NDP_REG) & 0x7f; + vndp = hwa742_read_reg(HWA742_V_NDP_REG); + + /* time to transfer one pixel (16bpp) in ps */ + hwa742.pix_tx_time = hwa742.reg_timings.we_cycle_time; + if (hwa742.extif->get_max_tx_rate != NULL) { + /* + * The external interface might have a rate limitation, + * if so, we have to maximize our transfer rate. + */ + unsigned long min_tx_time; + unsigned long max_tx_rate = hwa742.extif->get_max_tx_rate(); + + dev_dbg(hwa742.fbdev->dev, "max_tx_rate %ld HZ\n", + max_tx_rate); + min_tx_time = 1000000000 / (max_tx_rate / 1000); /* ps */ + if (hwa742.pix_tx_time < min_tx_time) + hwa742.pix_tx_time = min_tx_time; + } + + /* time to update one line in ps */ + hwa742.line_upd_time = (hdisp + hndp) * 1000000 / (pix_clk / 1000); + hwa742.line_upd_time *= 1000; + if (hdisp * hwa742.pix_tx_time > hwa742.line_upd_time) + /* + * transfer speed too low, we might have to use both + * HS and VS + */ + use_hsvs = 1; + else + /* decent transfer speed, we'll always use only VS */ + use_hsvs = 0; + + if (use_hsvs && (hs_pol_inv || vs_pol_inv)) { + /* + * HS or'ed with VS doesn't work, use the active high + * TE signal based on HNDP / VNDP + */ + use_ndp = 1; + hs_pol_inv = 0; + vs_pol_inv = 0; + hs = hndp; + vs = vndp; + } else { + /* + * Use HS or'ed with VS as a TE signal if both are needed + * or VNDP if only vsync is needed. + */ + use_ndp = 0; + hs = hsw; + vs = vsw; + if (!use_hsvs) { + hs_pol_inv = 0; + vs_pol_inv = 0; + } + } + + hs = hs * 1000000 / (pix_clk / 1000); /* ps */ + hs *= 1000; + + vs = vs * (hdisp + hndp) * 1000000 / (pix_clk / 1000); /* ps */ + vs *= 1000; + + if (vs <= hs) + return -EDOM; + /* set VS to 120% of HS to minimize VS detection time */ + vs = hs * 12 / 10; + /* minimize HS too */ + hs = 10000; + + b = hwa742_read_reg(HWA742_NDP_CTRL); + b &= ~0x3; + b |= use_hsvs ? 1 : 0; + b |= (use_ndp && use_hsvs) ? 0 : 2; + hwa742_write_reg(HWA742_NDP_CTRL, b); + + hwa742.vsync_only = !use_hsvs; + + dev_dbg(hwa742.fbdev->dev, + "pix_clk %ld HZ pix_tx_time %ld ps line_upd_time %ld ps\n", + pix_clk, hwa742.pix_tx_time, hwa742.line_upd_time); + dev_dbg(hwa742.fbdev->dev, + "hs %d ps vs %d ps mode %d vsync_only %d\n", + hs, vs, (b & 0x3), !use_hsvs); + + return hwa742.extif->setup_tearsync(1, hs, vs, + hs_pol_inv, vs_pol_inv, extif_div); +} + +static void hwa742_get_caps(int plane, struct omapfb_caps *caps) +{ + hwa742.int_ctrl->get_caps(plane, caps); + caps->ctrl |= OMAPFB_CAPS_MANUAL_UPDATE | + OMAPFB_CAPS_WINDOW_PIXEL_DOUBLE; + if (hwa742.te_connected) + caps->ctrl |= OMAPFB_CAPS_TEARSYNC; + caps->wnd_color |= (1 << OMAPFB_COLOR_RGB565) | + (1 << OMAPFB_COLOR_YUV420); +} + +static void hwa742_suspend(void) +{ + hwa742.update_mode_before_suspend = hwa742.update_mode; + hwa742_set_update_mode(OMAPFB_UPDATE_DISABLED); + /* Enable sleep mode */ + hwa742_write_reg(HWA742_POWER_SAVE, 1 << 1); + if (hwa742.power_down != NULL) + hwa742.power_down(hwa742.fbdev->dev); +} + +static void hwa742_resume(void) +{ + if (hwa742.power_up != NULL) + hwa742.power_up(hwa742.fbdev->dev); + /* Disable sleep mode */ + hwa742_write_reg(HWA742_POWER_SAVE, 0); + while (1) { + /* Loop until PLL output is stabilized */ + if (hwa742_read_reg(HWA742_PLL_DIV_REG) & (1 << 7)) + break; + set_current_state(TASK_UNINTERRUPTIBLE); + schedule_timeout(msecs_to_jiffies(5)); + } + hwa742_set_update_mode(hwa742.update_mode_before_suspend); +} + +static int hwa742_init(struct omapfb_device *fbdev, int ext_mode, + struct omapfb_mem_desc *req_vram) +{ + int r = 0, i; + u8 rev, conf; + unsigned long ext_clk; + unsigned long sys_clk, pix_clk; + int extif_mem_div; + struct omapfb_platform_data *omapfb_conf; + struct hwa742_platform_data *ctrl_conf; + + BUG_ON(!fbdev->ext_if || !fbdev->int_ctrl); + + hwa742.fbdev = fbdev; + hwa742.extif = fbdev->ext_if; + hwa742.int_ctrl = fbdev->int_ctrl; + + omapfb_conf = fbdev->dev->platform_data; + ctrl_conf = omapfb_conf->ctrl_platform_data; + + if (ctrl_conf == NULL || ctrl_conf->get_clock_rate == NULL) { + dev_err(fbdev->dev, "HWA742: missing platform data\n"); + r = -ENOENT; + goto err1; + } + + hwa742.power_down = ctrl_conf->power_down; + hwa742.power_up = ctrl_conf->power_up; + + spin_lock_init(&hwa742.req_lock); + + if ((r = hwa742.int_ctrl->init(fbdev, 1, req_vram)) < 0) + goto err1; + + if ((r = hwa742.extif->init(fbdev)) < 0) + goto err2; + + ext_clk = ctrl_conf->get_clock_rate(fbdev->dev); + if ((r = calc_extif_timings(ext_clk, &extif_mem_div)) < 0) + goto err3; + hwa742.extif->set_timings(&hwa742.reg_timings); + if (hwa742.power_up != NULL) + hwa742.power_up(fbdev->dev); + + calc_hwa742_clk_rates(ext_clk, &sys_clk, &pix_clk); + if ((r = calc_extif_timings(sys_clk, &extif_mem_div)) < 0) + goto err4; + hwa742.extif->set_timings(&hwa742.reg_timings); + + rev = hwa742_read_reg(HWA742_REV_CODE_REG); + if ((rev & 0xfc) != 0x80) { + dev_err(fbdev->dev, "HWA742: invalid revision %02x\n", rev); + r = -ENODEV; + goto err4; + } + + + if (!(hwa742_read_reg(HWA742_PLL_DIV_REG) & 0x80)) { + dev_err(fbdev->dev, + "HWA742: controller not initialized by the bootloader\n"); + r = -ENODEV; + goto err4; + } + + if (ctrl_conf->te_connected) { + if ((r = setup_tearsync(pix_clk, extif_mem_div)) < 0) { + dev_err(hwa742.fbdev->dev, + "HWA742: can't setup tearing synchronization\n"); + goto err4; + } + hwa742.te_connected = 1; + } + + hwa742.max_transmit_size = hwa742.extif->max_transmit_size; + + hwa742.update_mode = OMAPFB_UPDATE_DISABLED; + + hwa742.auto_update_window.x = 0; + hwa742.auto_update_window.y = 0; + hwa742.auto_update_window.width = fbdev->panel->x_res; + hwa742.auto_update_window.height = fbdev->panel->y_res; + hwa742.auto_update_window.format = 0; + + init_timer(&hwa742.auto_update_timer); + hwa742.auto_update_timer.function = hwa742_update_window_auto; + hwa742.auto_update_timer.data = 0; + + hwa742.prev_color_mode = -1; + hwa742.prev_flags = 0; + + hwa742.fbdev = fbdev; + + INIT_LIST_HEAD(&hwa742.free_req_list); + INIT_LIST_HEAD(&hwa742.pending_req_list); + for (i = 0; i < ARRAY_SIZE(hwa742.req_pool); i++) + list_add(&hwa742.req_pool[i].entry, &hwa742.free_req_list); + BUG_ON(i <= IRQ_REQ_POOL_SIZE); + sema_init(&hwa742.req_sema, i - IRQ_REQ_POOL_SIZE); + + conf = hwa742_read_reg(HWA742_CONFIG_REG); + dev_info(fbdev->dev, ": Epson HWA742 LCD controller rev %d " + "initialized (CNF pins %x)\n", rev & 0x03, conf & 0x07); + + return 0; +err4: + if (hwa742.power_down != NULL) + hwa742.power_down(fbdev->dev); +err3: + hwa742.extif->cleanup(); +err2: + hwa742.int_ctrl->cleanup(); +err1: + return r; +} + +static void hwa742_cleanup(void) +{ + hwa742_set_update_mode(OMAPFB_UPDATE_DISABLED); + hwa742.extif->cleanup(); + hwa742.int_ctrl->cleanup(); + if (hwa742.power_down != NULL) + hwa742.power_down(hwa742.fbdev->dev); +} + +struct lcd_ctrl hwa742_ctrl = { + .name = "hwa742", + .init = hwa742_init, + .cleanup = hwa742_cleanup, + .bind_client = hwa742_bind_client, + .get_caps = hwa742_get_caps, + .set_update_mode = hwa742_set_update_mode, + .get_update_mode = hwa742_get_update_mode, + .setup_plane = hwa742_setup_plane, + .enable_plane = hwa742_enable_plane, + .update_window = hwa742_update_window_async, + .sync = hwa742_sync, + .suspend = hwa742_suspend, + .resume = hwa742_resume, +}; + |