| /* |
| * SuperH Mobile LCDC Framebuffer |
| * |
| * Copyright (c) 2008 Magnus Damm |
| * |
| * This file is subject to the terms and conditions of the GNU General Public |
| * License. See the file "COPYING" in the main directory of this archive |
| * for more details. |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/init.h> |
| #include <linux/delay.h> |
| #include <linux/mm.h> |
| #include <linux/clk.h> |
| #include <linux/pm_runtime.h> |
| #include <linux/platform_device.h> |
| #include <linux/dma-mapping.h> |
| #include <linux/interrupt.h> |
| #include <linux/vmalloc.h> |
| #include <linux/ioctl.h> |
| #include <linux/slab.h> |
| #include <linux/console.h> |
| #include <linux/backlight.h> |
| #include <linux/gpio.h> |
| #include <video/sh_mobile_lcdc.h> |
| #include <video/sh_mobile_meram.h> |
| #include <linux/atomic.h> |
| |
| #include "sh_mobile_lcdcfb.h" |
| |
| #define SIDE_B_OFFSET 0x1000 |
| #define MIRROR_OFFSET 0x2000 |
| |
| #define MAX_XRES 1920 |
| #define MAX_YRES 1080 |
| |
| static unsigned long lcdc_offs_mainlcd[NR_CH_REGS] = { |
| [LDDCKPAT1R] = 0x400, |
| [LDDCKPAT2R] = 0x404, |
| [LDMT1R] = 0x418, |
| [LDMT2R] = 0x41c, |
| [LDMT3R] = 0x420, |
| [LDDFR] = 0x424, |
| [LDSM1R] = 0x428, |
| [LDSM2R] = 0x42c, |
| [LDSA1R] = 0x430, |
| [LDSA2R] = 0x434, |
| [LDMLSR] = 0x438, |
| [LDHCNR] = 0x448, |
| [LDHSYNR] = 0x44c, |
| [LDVLNR] = 0x450, |
| [LDVSYNR] = 0x454, |
| [LDPMR] = 0x460, |
| [LDHAJR] = 0x4a0, |
| }; |
| |
| static unsigned long lcdc_offs_sublcd[NR_CH_REGS] = { |
| [LDDCKPAT1R] = 0x408, |
| [LDDCKPAT2R] = 0x40c, |
| [LDMT1R] = 0x600, |
| [LDMT2R] = 0x604, |
| [LDMT3R] = 0x608, |
| [LDDFR] = 0x60c, |
| [LDSM1R] = 0x610, |
| [LDSM2R] = 0x614, |
| [LDSA1R] = 0x618, |
| [LDMLSR] = 0x620, |
| [LDHCNR] = 0x624, |
| [LDHSYNR] = 0x628, |
| [LDVLNR] = 0x62c, |
| [LDVSYNR] = 0x630, |
| [LDPMR] = 0x63c, |
| }; |
| |
| static const struct fb_videomode default_720p = { |
| .name = "HDMI 720p", |
| .xres = 1280, |
| .yres = 720, |
| |
| .left_margin = 220, |
| .right_margin = 110, |
| .hsync_len = 40, |
| |
| .upper_margin = 20, |
| .lower_margin = 5, |
| .vsync_len = 5, |
| |
| .pixclock = 13468, |
| .refresh = 60, |
| .sync = FB_SYNC_VERT_HIGH_ACT | FB_SYNC_HOR_HIGH_ACT, |
| }; |
| |
| struct sh_mobile_lcdc_priv { |
| void __iomem *base; |
| int irq; |
| atomic_t hw_usecnt; |
| struct device *dev; |
| struct clk *dot_clk; |
| unsigned long lddckr; |
| struct sh_mobile_lcdc_chan ch[2]; |
| struct notifier_block notifier; |
| int started; |
| int forced_bpp; /* 2 channel LCDC must share bpp setting */ |
| struct sh_mobile_meram_info *meram_dev; |
| }; |
| |
| static bool banked(int reg_nr) |
| { |
| switch (reg_nr) { |
| case LDMT1R: |
| case LDMT2R: |
| case LDMT3R: |
| case LDDFR: |
| case LDSM1R: |
| case LDSA1R: |
| case LDSA2R: |
| case LDMLSR: |
| case LDHCNR: |
| case LDHSYNR: |
| case LDVLNR: |
| case LDVSYNR: |
| return true; |
| } |
| return false; |
| } |
| |
| static void lcdc_write_chan(struct sh_mobile_lcdc_chan *chan, |
| int reg_nr, unsigned long data) |
| { |
| iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr]); |
| if (banked(reg_nr)) |
| iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr] + |
| SIDE_B_OFFSET); |
| } |
| |
| static void lcdc_write_chan_mirror(struct sh_mobile_lcdc_chan *chan, |
| int reg_nr, unsigned long data) |
| { |
| iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr] + |
| MIRROR_OFFSET); |
| } |
| |
| static unsigned long lcdc_read_chan(struct sh_mobile_lcdc_chan *chan, |
| int reg_nr) |
| { |
| return ioread32(chan->lcdc->base + chan->reg_offs[reg_nr]); |
| } |
| |
| static void lcdc_write(struct sh_mobile_lcdc_priv *priv, |
| unsigned long reg_offs, unsigned long data) |
| { |
| iowrite32(data, priv->base + reg_offs); |
| } |
| |
| static unsigned long lcdc_read(struct sh_mobile_lcdc_priv *priv, |
| unsigned long reg_offs) |
| { |
| return ioread32(priv->base + reg_offs); |
| } |
| |
| static void lcdc_wait_bit(struct sh_mobile_lcdc_priv *priv, |
| unsigned long reg_offs, |
| unsigned long mask, unsigned long until) |
| { |
| while ((lcdc_read(priv, reg_offs) & mask) != until) |
| cpu_relax(); |
| } |
| |
| static int lcdc_chan_is_sublcd(struct sh_mobile_lcdc_chan *chan) |
| { |
| return chan->cfg.chan == LCDC_CHAN_SUBLCD; |
| } |
| |
| static void lcdc_sys_write_index(void *handle, unsigned long data) |
| { |
| struct sh_mobile_lcdc_chan *ch = handle; |
| |
| lcdc_write(ch->lcdc, _LDDWD0R, data | LDDWDxR_WDACT); |
| lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0); |
| lcdc_write(ch->lcdc, _LDDWAR, LDDWAR_WA | |
| (lcdc_chan_is_sublcd(ch) ? 2 : 0)); |
| lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0); |
| } |
| |
| static void lcdc_sys_write_data(void *handle, unsigned long data) |
| { |
| struct sh_mobile_lcdc_chan *ch = handle; |
| |
| lcdc_write(ch->lcdc, _LDDWD0R, data | LDDWDxR_WDACT | LDDWDxR_RSW); |
| lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0); |
| lcdc_write(ch->lcdc, _LDDWAR, LDDWAR_WA | |
| (lcdc_chan_is_sublcd(ch) ? 2 : 0)); |
| lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0); |
| } |
| |
| static unsigned long lcdc_sys_read_data(void *handle) |
| { |
| struct sh_mobile_lcdc_chan *ch = handle; |
| |
| lcdc_write(ch->lcdc, _LDDRDR, LDDRDR_RSR); |
| lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0); |
| lcdc_write(ch->lcdc, _LDDRAR, LDDRAR_RA | |
| (lcdc_chan_is_sublcd(ch) ? 2 : 0)); |
| udelay(1); |
| lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0); |
| |
| return lcdc_read(ch->lcdc, _LDDRDR) & LDDRDR_DRD_MASK; |
| } |
| |
| struct sh_mobile_lcdc_sys_bus_ops sh_mobile_lcdc_sys_bus_ops = { |
| lcdc_sys_write_index, |
| lcdc_sys_write_data, |
| lcdc_sys_read_data, |
| }; |
| |
| static void sh_mobile_lcdc_clk_on(struct sh_mobile_lcdc_priv *priv) |
| { |
| if (atomic_inc_and_test(&priv->hw_usecnt)) { |
| if (priv->dot_clk) |
| clk_enable(priv->dot_clk); |
| pm_runtime_get_sync(priv->dev); |
| if (priv->meram_dev && priv->meram_dev->pdev) |
| pm_runtime_get_sync(&priv->meram_dev->pdev->dev); |
| } |
| } |
| |
| static void sh_mobile_lcdc_clk_off(struct sh_mobile_lcdc_priv *priv) |
| { |
| if (atomic_sub_return(1, &priv->hw_usecnt) == -1) { |
| if (priv->meram_dev && priv->meram_dev->pdev) |
| pm_runtime_put_sync(&priv->meram_dev->pdev->dev); |
| pm_runtime_put(priv->dev); |
| if (priv->dot_clk) |
| clk_disable(priv->dot_clk); |
| } |
| } |
| |
| static int sh_mobile_lcdc_sginit(struct fb_info *info, |
| struct list_head *pagelist) |
| { |
| struct sh_mobile_lcdc_chan *ch = info->par; |
| unsigned int nr_pages_max = info->fix.smem_len >> PAGE_SHIFT; |
| struct page *page; |
| int nr_pages = 0; |
| |
| sg_init_table(ch->sglist, nr_pages_max); |
| |
| list_for_each_entry(page, pagelist, lru) |
| sg_set_page(&ch->sglist[nr_pages++], page, PAGE_SIZE, 0); |
| |
| return nr_pages; |
| } |
| |
| static void sh_mobile_lcdc_deferred_io(struct fb_info *info, |
| struct list_head *pagelist) |
| { |
| struct sh_mobile_lcdc_chan *ch = info->par; |
| struct sh_mobile_lcdc_board_cfg *bcfg = &ch->cfg.board_cfg; |
| |
| /* enable clocks before accessing hardware */ |
| sh_mobile_lcdc_clk_on(ch->lcdc); |
| |
| /* |
| * It's possible to get here without anything on the pagelist via |
| * sh_mobile_lcdc_deferred_io_touch() or via a userspace fsync() |
| * invocation. In the former case, the acceleration routines are |
| * stepped in to when using the framebuffer console causing the |
| * workqueue to be scheduled without any dirty pages on the list. |
| * |
| * Despite this, a panel update is still needed given that the |
| * acceleration routines have their own methods for writing in |
| * that still need to be updated. |
| * |
| * The fsync() and empty pagelist case could be optimized for, |
| * but we don't bother, as any application exhibiting such |
| * behaviour is fundamentally broken anyways. |
| */ |
| if (!list_empty(pagelist)) { |
| unsigned int nr_pages = sh_mobile_lcdc_sginit(info, pagelist); |
| |
| /* trigger panel update */ |
| dma_map_sg(info->dev, ch->sglist, nr_pages, DMA_TO_DEVICE); |
| if (bcfg->start_transfer) |
| bcfg->start_transfer(bcfg->board_data, ch, |
| &sh_mobile_lcdc_sys_bus_ops); |
| lcdc_write_chan(ch, LDSM2R, LDSM2R_OSTRG); |
| dma_unmap_sg(info->dev, ch->sglist, nr_pages, DMA_TO_DEVICE); |
| } else { |
| if (bcfg->start_transfer) |
| bcfg->start_transfer(bcfg->board_data, ch, |
| &sh_mobile_lcdc_sys_bus_ops); |
| lcdc_write_chan(ch, LDSM2R, LDSM2R_OSTRG); |
| } |
| } |
| |
| static void sh_mobile_lcdc_deferred_io_touch(struct fb_info *info) |
| { |
| struct fb_deferred_io *fbdefio = info->fbdefio; |
| |
| if (fbdefio) |
| schedule_delayed_work(&info->deferred_work, fbdefio->delay); |
| } |
| |
| static irqreturn_t sh_mobile_lcdc_irq(int irq, void *data) |
| { |
| struct sh_mobile_lcdc_priv *priv = data; |
| struct sh_mobile_lcdc_chan *ch; |
| unsigned long ldintr; |
| int is_sub; |
| int k; |
| |
| /* Acknowledge interrupts and disable further VSYNC End IRQs. */ |
| ldintr = lcdc_read(priv, _LDINTR); |
| lcdc_write(priv, _LDINTR, (ldintr ^ LDINTR_STATUS_MASK) & ~LDINTR_VEE); |
| |
| /* figure out if this interrupt is for main or sub lcd */ |
| is_sub = (lcdc_read(priv, _LDSR) & LDSR_MSS) ? 1 : 0; |
| |
| /* wake up channel and disable clocks */ |
| for (k = 0; k < ARRAY_SIZE(priv->ch); k++) { |
| ch = &priv->ch[k]; |
| |
| if (!ch->enabled) |
| continue; |
| |
| /* Frame End */ |
| if (ldintr & LDINTR_FS) { |
| if (is_sub == lcdc_chan_is_sublcd(ch)) { |
| ch->frame_end = 1; |
| wake_up(&ch->frame_end_wait); |
| |
| sh_mobile_lcdc_clk_off(priv); |
| } |
| } |
| |
| /* VSYNC End */ |
| if (ldintr & LDINTR_VES) |
| complete(&ch->vsync_completion); |
| } |
| |
| return IRQ_HANDLED; |
| } |
| |
| static void sh_mobile_lcdc_start_stop(struct sh_mobile_lcdc_priv *priv, |
| int start) |
| { |
| unsigned long tmp = lcdc_read(priv, _LDCNT2R); |
| int k; |
| |
| /* start or stop the lcdc */ |
| if (start) |
| lcdc_write(priv, _LDCNT2R, tmp | LDCNT2R_DO); |
| else |
| lcdc_write(priv, _LDCNT2R, tmp & ~LDCNT2R_DO); |
| |
| /* wait until power is applied/stopped on all channels */ |
| for (k = 0; k < ARRAY_SIZE(priv->ch); k++) |
| if (lcdc_read(priv, _LDCNT2R) & priv->ch[k].enabled) |
| while (1) { |
| tmp = lcdc_read_chan(&priv->ch[k], LDPMR) |
| & LDPMR_LPS; |
| if (start && tmp == LDPMR_LPS) |
| break; |
| if (!start && tmp == 0) |
| break; |
| cpu_relax(); |
| } |
| |
| if (!start) |
| lcdc_write(priv, _LDDCKSTPR, 1); /* stop dotclock */ |
| } |
| |
| static void sh_mobile_lcdc_geometry(struct sh_mobile_lcdc_chan *ch) |
| { |
| struct fb_var_screeninfo *var = &ch->info->var, *display_var = &ch->display_var; |
| unsigned long h_total, hsync_pos, display_h_total; |
| u32 tmp; |
| |
| tmp = ch->ldmt1r_value; |
| tmp |= (var->sync & FB_SYNC_VERT_HIGH_ACT) ? 0 : LDMT1R_VPOL; |
| tmp |= (var->sync & FB_SYNC_HOR_HIGH_ACT) ? 0 : LDMT1R_HPOL; |
| tmp |= (ch->cfg.flags & LCDC_FLAGS_DWPOL) ? LDMT1R_DWPOL : 0; |
| tmp |= (ch->cfg.flags & LCDC_FLAGS_DIPOL) ? LDMT1R_DIPOL : 0; |
| tmp |= (ch->cfg.flags & LCDC_FLAGS_DAPOL) ? LDMT1R_DAPOL : 0; |
| tmp |= (ch->cfg.flags & LCDC_FLAGS_HSCNT) ? LDMT1R_HSCNT : 0; |
| tmp |= (ch->cfg.flags & LCDC_FLAGS_DWCNT) ? LDMT1R_DWCNT : 0; |
| lcdc_write_chan(ch, LDMT1R, tmp); |
| |
| /* setup SYS bus */ |
| lcdc_write_chan(ch, LDMT2R, ch->cfg.sys_bus_cfg.ldmt2r); |
| lcdc_write_chan(ch, LDMT3R, ch->cfg.sys_bus_cfg.ldmt3r); |
| |
| /* horizontal configuration */ |
| h_total = display_var->xres + display_var->hsync_len + |
| display_var->left_margin + display_var->right_margin; |
| tmp = h_total / 8; /* HTCN */ |
| tmp |= (min(display_var->xres, var->xres) / 8) << 16; /* HDCN */ |
| lcdc_write_chan(ch, LDHCNR, tmp); |
| |
| hsync_pos = display_var->xres + display_var->right_margin; |
| tmp = hsync_pos / 8; /* HSYNP */ |
| tmp |= (display_var->hsync_len / 8) << 16; /* HSYNW */ |
| lcdc_write_chan(ch, LDHSYNR, tmp); |
| |
| /* vertical configuration */ |
| tmp = display_var->yres + display_var->vsync_len + |
| display_var->upper_margin + display_var->lower_margin; /* VTLN */ |
| tmp |= min(display_var->yres, var->yres) << 16; /* VDLN */ |
| lcdc_write_chan(ch, LDVLNR, tmp); |
| |
| tmp = display_var->yres + display_var->lower_margin; /* VSYNP */ |
| tmp |= display_var->vsync_len << 16; /* VSYNW */ |
| lcdc_write_chan(ch, LDVSYNR, tmp); |
| |
| /* Adjust horizontal synchronisation for HDMI */ |
| display_h_total = display_var->xres + display_var->hsync_len + |
| display_var->left_margin + display_var->right_margin; |
| tmp = ((display_var->xres & 7) << 24) | |
| ((display_h_total & 7) << 16) | |
| ((display_var->hsync_len & 7) << 8) | |
| hsync_pos; |
| lcdc_write_chan(ch, LDHAJR, tmp); |
| } |
| |
| /* |
| * __sh_mobile_lcdc_start - Configure and tart the LCDC |
| * @priv: LCDC device |
| * |
| * Configure all enabled channels and start the LCDC device. All external |
| * devices (clocks, MERAM, panels, ...) are not touched by this function. |
| */ |
| static void __sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv) |
| { |
| struct sh_mobile_lcdc_chan *ch; |
| unsigned long tmp; |
| int bpp = 0; |
| int k, m; |
| |
| /* Enable LCDC channels. Read data from external memory, avoid using the |
| * BEU for now. |
| */ |
| lcdc_write(priv, _LDCNT2R, priv->ch[0].enabled | priv->ch[1].enabled); |
| |
| /* Stop the LCDC first and disable all interrupts. */ |
| sh_mobile_lcdc_start_stop(priv, 0); |
| lcdc_write(priv, _LDINTR, 0); |
| |
| /* Configure power supply, dot clocks and start them. */ |
| tmp = priv->lddckr; |
| for (k = 0; k < ARRAY_SIZE(priv->ch); k++) { |
| ch = &priv->ch[k]; |
| if (!ch->enabled) |
| continue; |
| |
| if (!bpp) |
| bpp = ch->info->var.bits_per_pixel; |
| |
| /* Power supply */ |
| lcdc_write_chan(ch, LDPMR, 0); |
| |
| m = ch->cfg.clock_divider; |
| if (!m) |
| continue; |
| |
| /* FIXME: sh7724 can only use 42, 48, 54 and 60 for the divider |
| * denominator. |
| */ |
| lcdc_write_chan(ch, LDDCKPAT1R, 0); |
| lcdc_write_chan(ch, LDDCKPAT2R, (1 << (m/2)) - 1); |
| |
| if (m == 1) |
| m = LDDCKR_MOSEL; |
| tmp |= m << (lcdc_chan_is_sublcd(ch) ? 8 : 0); |
| } |
| |
| lcdc_write(priv, _LDDCKR, tmp); |
| lcdc_write(priv, _LDDCKSTPR, 0); |
| lcdc_wait_bit(priv, _LDDCKSTPR, ~0, 0); |
| |
| /* Setup geometry, format, frame buffer memory and operation mode. */ |
| for (k = 0; k < ARRAY_SIZE(priv->ch); k++) { |
| ch = &priv->ch[k]; |
| if (!ch->enabled) |
| continue; |
| |
| sh_mobile_lcdc_geometry(ch); |
| |
| if (ch->info->var.nonstd) { |
| tmp = (ch->info->var.nonstd << 16); |
| switch (ch->info->var.bits_per_pixel) { |
| case 12: |
| tmp |= LDDFR_YF_420; |
| break; |
| case 16: |
| tmp |= LDDFR_YF_422; |
| break; |
| case 24: |
| default: |
| tmp |= LDDFR_YF_444; |
| break; |
| } |
| } else { |
| switch (ch->info->var.bits_per_pixel) { |
| case 16: |
| tmp = LDDFR_PKF_RGB16; |
| break; |
| case 24: |
| tmp = LDDFR_PKF_RGB24; |
| break; |
| case 32: |
| default: |
| tmp = LDDFR_PKF_ARGB32; |
| break; |
| } |
| } |
| |
| lcdc_write_chan(ch, LDDFR, tmp); |
| lcdc_write_chan(ch, LDMLSR, ch->pitch); |
| lcdc_write_chan(ch, LDSA1R, ch->base_addr_y); |
| if (ch->info->var.nonstd) |
| lcdc_write_chan(ch, LDSA2R, ch->base_addr_c); |
| |
| /* When using deferred I/O mode, configure the LCDC for one-shot |
| * operation and enable the frame end interrupt. Otherwise use |
| * continuous read mode. |
| */ |
| if (ch->ldmt1r_value & LDMT1R_IFM && |
| ch->cfg.sys_bus_cfg.deferred_io_msec) { |
| lcdc_write_chan(ch, LDSM1R, LDSM1R_OS); |
| lcdc_write(priv, _LDINTR, LDINTR_FE); |
| } else { |
| lcdc_write_chan(ch, LDSM1R, 0); |
| } |
| } |
| |
| /* Word and long word swap. */ |
| if (priv->ch[0].info->var.nonstd) |
| tmp = LDDDSR_LS | LDDDSR_WS | LDDDSR_BS; |
| else { |
| switch (bpp) { |
| case 16: |
| tmp = LDDDSR_LS | LDDDSR_WS; |
| break; |
| case 24: |
| tmp = LDDDSR_LS | LDDDSR_WS | LDDDSR_BS; |
| break; |
| case 32: |
| default: |
| tmp = LDDDSR_LS; |
| break; |
| } |
| } |
| lcdc_write(priv, _LDDDSR, tmp); |
| |
| /* Enable the display output. */ |
| lcdc_write(priv, _LDCNT1R, LDCNT1R_DE); |
| sh_mobile_lcdc_start_stop(priv, 1); |
| priv->started = 1; |
| } |
| |
| static int sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv) |
| { |
| struct sh_mobile_meram_info *mdev = priv->meram_dev; |
| struct sh_mobile_lcdc_board_cfg *board_cfg; |
| struct sh_mobile_lcdc_chan *ch; |
| unsigned long tmp; |
| int ret; |
| int k; |
| |
| /* enable clocks before accessing the hardware */ |
| for (k = 0; k < ARRAY_SIZE(priv->ch); k++) { |
| if (priv->ch[k].enabled) |
| sh_mobile_lcdc_clk_on(priv); |
| } |
| |
| /* reset */ |
| lcdc_write(priv, _LDCNT2R, lcdc_read(priv, _LDCNT2R) | LDCNT2R_BR); |
| lcdc_wait_bit(priv, _LDCNT2R, LDCNT2R_BR, 0); |
| |
| for (k = 0; k < ARRAY_SIZE(priv->ch); k++) { |
| ch = &priv->ch[k]; |
| |
| if (!ch->enabled) |
| continue; |
| |
| board_cfg = &ch->cfg.board_cfg; |
| if (board_cfg->setup_sys) { |
| ret = board_cfg->setup_sys(board_cfg->board_data, ch, |
| &sh_mobile_lcdc_sys_bus_ops); |
| if (ret) |
| return ret; |
| } |
| } |
| |
| /* Compute frame buffer base address and pitch for each channel. */ |
| for (k = 0; k < ARRAY_SIZE(priv->ch); k++) { |
| struct sh_mobile_meram_cfg *cfg; |
| int pixelformat; |
| |
| ch = &priv->ch[k]; |
| if (!ch->enabled) |
| continue; |
| |
| ch->base_addr_y = ch->info->fix.smem_start; |
| ch->base_addr_c = ch->base_addr_y |
| + ch->info->var.xres |
| * ch->info->var.yres_virtual; |
| ch->pitch = ch->info->fix.line_length; |
| |
| /* Enable MERAM if possible. */ |
| cfg = ch->cfg.meram_cfg; |
| if (mdev == NULL || mdev->ops == NULL || cfg == NULL) |
| continue; |
| |
| /* we need to de-init configured ICBs before we can |
| * re-initialize them. |
| */ |
| if (ch->meram_enabled) { |
| mdev->ops->meram_unregister(mdev, cfg); |
| ch->meram_enabled = 0; |
| } |
| |
| if (!ch->info->var.nonstd) |
| pixelformat = SH_MOBILE_MERAM_PF_RGB; |
| else if (ch->info->var.bits_per_pixel == 24) |
| pixelformat = SH_MOBILE_MERAM_PF_NV24; |
| else |
| pixelformat = SH_MOBILE_MERAM_PF_NV; |
| |
| ret = mdev->ops->meram_register(mdev, cfg, ch->pitch, |
| ch->info->var.yres, pixelformat, |
| ch->base_addr_y, ch->base_addr_c, |
| &ch->base_addr_y, &ch->base_addr_c, |
| &ch->pitch); |
| if (!ret) |
| ch->meram_enabled = 1; |
| } |
| |
| /* Start the LCDC. */ |
| __sh_mobile_lcdc_start(priv); |
| |
| /* Setup deferred I/O, tell the board code to enable the panels, and |
| * turn backlight on. |
| */ |
| for (k = 0; k < ARRAY_SIZE(priv->ch); k++) { |
| ch = &priv->ch[k]; |
| if (!ch->enabled) |
| continue; |
| |
| tmp = ch->cfg.sys_bus_cfg.deferred_io_msec; |
| if (ch->ldmt1r_value & LDMT1R_IFM && tmp) { |
| ch->defio.deferred_io = sh_mobile_lcdc_deferred_io; |
| ch->defio.delay = msecs_to_jiffies(tmp); |
| ch->info->fbdefio = &ch->defio; |
| fb_deferred_io_init(ch->info); |
| } |
| |
| board_cfg = &ch->cfg.board_cfg; |
| if (board_cfg->display_on && try_module_get(board_cfg->owner)) { |
| board_cfg->display_on(board_cfg->board_data, ch->info); |
| module_put(board_cfg->owner); |
| } |
| |
| if (ch->bl) { |
| ch->bl->props.power = FB_BLANK_UNBLANK; |
| backlight_update_status(ch->bl); |
| } |
| } |
| |
| return 0; |
| } |
| |
| static void sh_mobile_lcdc_stop(struct sh_mobile_lcdc_priv *priv) |
| { |
| struct sh_mobile_lcdc_chan *ch; |
| struct sh_mobile_lcdc_board_cfg *board_cfg; |
| int k; |
| |
| /* clean up deferred io and ask board code to disable panel */ |
| for (k = 0; k < ARRAY_SIZE(priv->ch); k++) { |
| ch = &priv->ch[k]; |
| if (!ch->enabled) |
| continue; |
| |
| /* deferred io mode: |
| * flush frame, and wait for frame end interrupt |
| * clean up deferred io and enable clock |
| */ |
| if (ch->info && ch->info->fbdefio) { |
| ch->frame_end = 0; |
| schedule_delayed_work(&ch->info->deferred_work, 0); |
| wait_event(ch->frame_end_wait, ch->frame_end); |
| fb_deferred_io_cleanup(ch->info); |
| ch->info->fbdefio = NULL; |
| sh_mobile_lcdc_clk_on(priv); |
| } |
| |
| if (ch->bl) { |
| ch->bl->props.power = FB_BLANK_POWERDOWN; |
| backlight_update_status(ch->bl); |
| } |
| |
| board_cfg = &ch->cfg.board_cfg; |
| if (board_cfg->display_off && try_module_get(board_cfg->owner)) { |
| board_cfg->display_off(board_cfg->board_data); |
| module_put(board_cfg->owner); |
| } |
| |
| /* disable the meram */ |
| if (ch->meram_enabled) { |
| struct sh_mobile_meram_cfg *cfg; |
| struct sh_mobile_meram_info *mdev; |
| cfg = ch->cfg.meram_cfg; |
| mdev = priv->meram_dev; |
| mdev->ops->meram_unregister(mdev, cfg); |
| ch->meram_enabled = 0; |
| } |
| |
| } |
| |
| /* stop the lcdc */ |
| if (priv->started) { |
| sh_mobile_lcdc_start_stop(priv, 0); |
| priv->started = 0; |
| } |
| |
| /* stop clocks */ |
| for (k = 0; k < ARRAY_SIZE(priv->ch); k++) |
| if (priv->ch[k].enabled) |
| sh_mobile_lcdc_clk_off(priv); |
| } |
| |
| static int sh_mobile_lcdc_check_interface(struct sh_mobile_lcdc_chan *ch) |
| { |
| int interface_type = ch->cfg.interface_type; |
| |
| switch (interface_type) { |
| case RGB8: |
| case RGB9: |
| case RGB12A: |
| case RGB12B: |
| case RGB16: |
| case RGB18: |
| case RGB24: |
| case SYS8A: |
| case SYS8B: |
| case SYS8C: |
| case SYS8D: |
| case SYS9: |
| case SYS12: |
| case SYS16A: |
| case SYS16B: |
| case SYS16C: |
| case SYS18: |
| case SYS24: |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| /* SUBLCD only supports SYS interface */ |
| if (lcdc_chan_is_sublcd(ch)) { |
| if (!(interface_type & LDMT1R_IFM)) |
| return -EINVAL; |
| |
| interface_type &= ~LDMT1R_IFM; |
| } |
| |
| ch->ldmt1r_value = interface_type; |
| return 0; |
| } |
| |
| static int sh_mobile_lcdc_setup_clocks(struct platform_device *pdev, |
| int clock_source, |
| struct sh_mobile_lcdc_priv *priv) |
| { |
| char *str; |
| |
| switch (clock_source) { |
| case LCDC_CLK_BUS: |
| str = "bus_clk"; |
| priv->lddckr = LDDCKR_ICKSEL_BUS; |
| break; |
| case LCDC_CLK_PERIPHERAL: |
| str = "peripheral_clk"; |
| priv->lddckr = LDDCKR_ICKSEL_MIPI; |
| break; |
| case LCDC_CLK_EXTERNAL: |
| str = NULL; |
| priv->lddckr = LDDCKR_ICKSEL_HDMI; |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| if (str) { |
| priv->dot_clk = clk_get(&pdev->dev, str); |
| if (IS_ERR(priv->dot_clk)) { |
| dev_err(&pdev->dev, "cannot get dot clock %s\n", str); |
| return PTR_ERR(priv->dot_clk); |
| } |
| } |
| |
| /* Runtime PM support involves two step for this driver: |
| * 1) Enable Runtime PM |
| * 2) Force Runtime PM Resume since hardware is accessed from probe() |
| */ |
| priv->dev = &pdev->dev; |
| pm_runtime_enable(priv->dev); |
| pm_runtime_resume(priv->dev); |
| return 0; |
| } |
| |
| static int sh_mobile_lcdc_setcolreg(u_int regno, |
| u_int red, u_int green, u_int blue, |
| u_int transp, struct fb_info *info) |
| { |
| u32 *palette = info->pseudo_palette; |
| |
| if (regno >= PALETTE_NR) |
| return -EINVAL; |
| |
| /* only FB_VISUAL_TRUECOLOR supported */ |
| |
| red >>= 16 - info->var.red.length; |
| green >>= 16 - info->var.green.length; |
| blue >>= 16 - info->var.blue.length; |
| transp >>= 16 - info->var.transp.length; |
| |
| palette[regno] = (red << info->var.red.offset) | |
| (green << info->var.green.offset) | |
| (blue << info->var.blue.offset) | |
| (transp << info->var.transp.offset); |
| |
| return 0; |
| } |
| |
| static struct fb_fix_screeninfo sh_mobile_lcdc_fix = { |
| .id = "SH Mobile LCDC", |
| .type = FB_TYPE_PACKED_PIXELS, |
| .visual = FB_VISUAL_TRUECOLOR, |
| .accel = FB_ACCEL_NONE, |
| .xpanstep = 0, |
| .ypanstep = 1, |
| .ywrapstep = 0, |
| }; |
| |
| static void sh_mobile_lcdc_fillrect(struct fb_info *info, |
| const struct fb_fillrect *rect) |
| { |
| sys_fillrect(info, rect); |
| sh_mobile_lcdc_deferred_io_touch(info); |
| } |
| |
| static void sh_mobile_lcdc_copyarea(struct fb_info *info, |
| const struct fb_copyarea *area) |
| { |
| sys_copyarea(info, area); |
| sh_mobile_lcdc_deferred_io_touch(info); |
| } |
| |
| static void sh_mobile_lcdc_imageblit(struct fb_info *info, |
| const struct fb_image *image) |
| { |
| sys_imageblit(info, image); |
| sh_mobile_lcdc_deferred_io_touch(info); |
| } |
| |
| static int sh_mobile_fb_pan_display(struct fb_var_screeninfo *var, |
| struct fb_info *info) |
| { |
| struct sh_mobile_lcdc_chan *ch = info->par; |
| struct sh_mobile_lcdc_priv *priv = ch->lcdc; |
| unsigned long ldrcntr; |
| unsigned long new_pan_offset; |
| unsigned long base_addr_y, base_addr_c; |
| unsigned long c_offset; |
| |
| if (!info->var.nonstd) |
| new_pan_offset = var->yoffset * info->fix.line_length |
| + var->xoffset * (info->var.bits_per_pixel / 8); |
| else |
| new_pan_offset = var->yoffset * info->fix.line_length |
| + var->xoffset; |
| |
| if (new_pan_offset == ch->pan_offset) |
| return 0; /* No change, do nothing */ |
| |
| ldrcntr = lcdc_read(priv, _LDRCNTR); |
| |
| /* Set the source address for the next refresh */ |
| base_addr_y = ch->dma_handle + new_pan_offset; |
| if (info->var.nonstd) { |
| /* Set y offset */ |
| c_offset = var->yoffset * info->fix.line_length |
| * (info->var.bits_per_pixel - 8) / 8; |
| base_addr_c = ch->dma_handle |
| + info->var.xres * info->var.yres_virtual |
| + c_offset; |
| /* Set x offset */ |
| if (info->var.bits_per_pixel == 24) |
| base_addr_c += 2 * var->xoffset; |
| else |
| base_addr_c += var->xoffset; |
| } |
| |
| if (ch->meram_enabled) { |
| struct sh_mobile_meram_cfg *cfg; |
| struct sh_mobile_meram_info *mdev; |
| int ret; |
| |
| cfg = ch->cfg.meram_cfg; |
| mdev = priv->meram_dev; |
| ret = mdev->ops->meram_update(mdev, cfg, |
| base_addr_y, base_addr_c, |
| &base_addr_y, &base_addr_c); |
| if (ret) |
| return ret; |
| } |
| |
| ch->base_addr_y = base_addr_y; |
| ch->base_addr_c = base_addr_c; |
| |
| lcdc_write_chan_mirror(ch, LDSA1R, base_addr_y); |
| if (info->var.nonstd) |
| lcdc_write_chan_mirror(ch, LDSA2R, base_addr_c); |
| |
| if (lcdc_chan_is_sublcd(ch)) |
| lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_SRS); |
| else |
| lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_MRS); |
| |
| ch->pan_offset = new_pan_offset; |
| |
| sh_mobile_lcdc_deferred_io_touch(info); |
| |
| return 0; |
| } |
| |
| static int sh_mobile_wait_for_vsync(struct fb_info *info) |
| { |
| struct sh_mobile_lcdc_chan *ch = info->par; |
| unsigned long ldintr; |
| int ret; |
| |
| /* Enable VSync End interrupt and be careful not to acknowledge any |
| * pending interrupt. |
| */ |
| ldintr = lcdc_read(ch->lcdc, _LDINTR); |
| ldintr |= LDINTR_VEE | LDINTR_STATUS_MASK; |
| lcdc_write(ch->lcdc, _LDINTR, ldintr); |
| |
| ret = wait_for_completion_interruptible_timeout(&ch->vsync_completion, |
| msecs_to_jiffies(100)); |
| if (!ret) |
| return -ETIMEDOUT; |
| |
| return 0; |
| } |
| |
| static int sh_mobile_ioctl(struct fb_info *info, unsigned int cmd, |
| unsigned long arg) |
| { |
| int retval; |
| |
| switch (cmd) { |
| case FBIO_WAITFORVSYNC: |
| retval = sh_mobile_wait_for_vsync(info); |
| break; |
| |
| default: |
| retval = -ENOIOCTLCMD; |
| break; |
| } |
| return retval; |
| } |
| |
| static void sh_mobile_fb_reconfig(struct fb_info *info) |
| { |
| struct sh_mobile_lcdc_chan *ch = info->par; |
| struct fb_videomode mode1, mode2; |
| struct fb_event event; |
| int evnt = FB_EVENT_MODE_CHANGE_ALL; |
| |
| if (ch->use_count > 1 || (ch->use_count == 1 && !info->fbcon_par)) |
| /* More framebuffer users are active */ |
| return; |
| |
| fb_var_to_videomode(&mode1, &ch->display_var); |
| fb_var_to_videomode(&mode2, &info->var); |
| |
| if (fb_mode_is_equal(&mode1, &mode2)) |
| return; |
| |
| /* Display has been re-plugged, framebuffer is free now, reconfigure */ |
| if (fb_set_var(info, &ch->display_var) < 0) |
| /* Couldn't reconfigure, hopefully, can continue as before */ |
| return; |
| |
| /* |
| * fb_set_var() calls the notifier change internally, only if |
| * FBINFO_MISC_USEREVENT flag is set. Since we do not want to fake a |
| * user event, we have to call the chain ourselves. |
| */ |
| event.info = info; |
| event.data = &mode1; |
| fb_notifier_call_chain(evnt, &event); |
| } |
| |
| /* |
| * Locking: both .fb_release() and .fb_open() are called with info->lock held if |
| * user == 1, or with console sem held, if user == 0. |
| */ |
| static int sh_mobile_release(struct fb_info *info, int user) |
| { |
| struct sh_mobile_lcdc_chan *ch = info->par; |
| |
| mutex_lock(&ch->open_lock); |
| dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count); |
| |
| ch->use_count--; |
| |
| /* Nothing to reconfigure, when called from fbcon */ |
| if (user) { |
| console_lock(); |
| sh_mobile_fb_reconfig(info); |
| console_unlock(); |
| } |
| |
| mutex_unlock(&ch->open_lock); |
| |
| return 0; |
| } |
| |
| static int sh_mobile_open(struct fb_info *info, int user) |
| { |
| struct sh_mobile_lcdc_chan *ch = info->par; |
| |
| mutex_lock(&ch->open_lock); |
| ch->use_count++; |
| |
| dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count); |
| mutex_unlock(&ch->open_lock); |
| |
| return 0; |
| } |
| |
| static int sh_mobile_check_var(struct fb_var_screeninfo *var, struct fb_info *info) |
| { |
| struct sh_mobile_lcdc_chan *ch = info->par; |
| struct sh_mobile_lcdc_priv *p = ch->lcdc; |
| unsigned int best_dist = (unsigned int)-1; |
| unsigned int best_xres = 0; |
| unsigned int best_yres = 0; |
| unsigned int i; |
| |
| if (var->xres > MAX_XRES || var->yres > MAX_YRES) |
| return -EINVAL; |
| |
| /* If board code provides us with a list of available modes, make sure |
| * we use one of them. Find the mode closest to the requested one. The |
| * distance between two modes is defined as the size of the |
| * non-overlapping parts of the two rectangles. |
| */ |
| for (i = 0; i < ch->cfg.num_cfg; ++i) { |
| const struct fb_videomode *mode = &ch->cfg.lcd_cfg[i]; |
| unsigned int dist; |
| |
| /* We can only round up. */ |
| if (var->xres > mode->xres || var->yres > mode->yres) |
| continue; |
| |
| dist = var->xres * var->yres + mode->xres * mode->yres |
| - 2 * min(var->xres, mode->xres) |
| * min(var->yres, mode->yres); |
| |
| if (dist < best_dist) { |
| best_xres = mode->xres; |
| best_yres = mode->yres; |
| best_dist = dist; |
| } |
| } |
| |
| /* If no available mode can be used, return an error. */ |
| if (ch->cfg.num_cfg != 0) { |
| if (best_dist == (unsigned int)-1) |
| return -EINVAL; |
| |
| var->xres = best_xres; |
| var->yres = best_yres; |
| } |
| |
| /* Make sure the virtual resolution is at least as big as the visible |
| * resolution. |
| */ |
| if (var->xres_virtual < var->xres) |
| var->xres_virtual = var->xres; |
| if (var->yres_virtual < var->yres) |
| var->yres_virtual = var->yres; |
| |
| if (var->bits_per_pixel <= 16) { /* RGB 565 */ |
| var->bits_per_pixel = 16; |
| var->red.offset = 11; |
| var->red.length = 5; |
| var->green.offset = 5; |
| var->green.length = 6; |
| var->blue.offset = 0; |
| var->blue.length = 5; |
| var->transp.offset = 0; |
| var->transp.length = 0; |
| } else if (var->bits_per_pixel <= 24) { /* RGB 888 */ |
| var->bits_per_pixel = 24; |
| var->red.offset = 16; |
| var->red.length = 8; |
| var->green.offset = 8; |
| var->green.length = 8; |
| var->blue.offset = 0; |
| var->blue.length = 8; |
| var->transp.offset = 0; |
| var->transp.length = 0; |
| } else if (var->bits_per_pixel <= 32) { /* RGBA 888 */ |
| var->bits_per_pixel = 32; |
| var->red.offset = 16; |
| var->red.length = 8; |
| var->green.offset = 8; |
| var->green.length = 8; |
| var->blue.offset = 0; |
| var->blue.length = 8; |
| var->transp.offset = 24; |
| var->transp.length = 8; |
| } else |
| return -EINVAL; |
| |
| var->red.msb_right = 0; |
| var->green.msb_right = 0; |
| var->blue.msb_right = 0; |
| var->transp.msb_right = 0; |
| |
| /* Make sure we don't exceed our allocated memory. */ |
| if (var->xres_virtual * var->yres_virtual * var->bits_per_pixel / 8 > |
| info->fix.smem_len) |
| return -EINVAL; |
| |
| /* only accept the forced_bpp for dual channel configurations */ |
| if (p->forced_bpp && p->forced_bpp != var->bits_per_pixel) |
| return -EINVAL; |
| |
| return 0; |
| } |
| |
| static int sh_mobile_set_par(struct fb_info *info) |
| { |
| struct sh_mobile_lcdc_chan *ch = info->par; |
| u32 line_length = info->fix.line_length; |
| int ret; |
| |
| sh_mobile_lcdc_stop(ch->lcdc); |
| |
| if (info->var.nonstd) |
| info->fix.line_length = info->var.xres; |
| else |
| info->fix.line_length = info->var.xres |
| * info->var.bits_per_pixel / 8; |
| |
| ret = sh_mobile_lcdc_start(ch->lcdc); |
| if (ret < 0) { |
| dev_err(info->dev, "%s: unable to restart LCDC\n", __func__); |
| info->fix.line_length = line_length; |
| } |
| |
| return ret; |
| } |
| |
| /* |
| * Screen blanking. Behavior is as follows: |
| * FB_BLANK_UNBLANK: screen unblanked, clocks enabled |
| * FB_BLANK_NORMAL: screen blanked, clocks enabled |
| * FB_BLANK_VSYNC, |
| * FB_BLANK_HSYNC, |
| * FB_BLANK_POWEROFF: screen blanked, clocks disabled |
| */ |
| static int sh_mobile_lcdc_blank(int blank, struct fb_info *info) |
| { |
| struct sh_mobile_lcdc_chan *ch = info->par; |
| struct sh_mobile_lcdc_priv *p = ch->lcdc; |
| |
| /* blank the screen? */ |
| if (blank > FB_BLANK_UNBLANK && ch->blank_status == FB_BLANK_UNBLANK) { |
| struct fb_fillrect rect = { |
| .width = info->var.xres, |
| .height = info->var.yres, |
| }; |
| sh_mobile_lcdc_fillrect(info, &rect); |
| } |
| /* turn clocks on? */ |
| if (blank <= FB_BLANK_NORMAL && ch->blank_status > FB_BLANK_NORMAL) { |
| sh_mobile_lcdc_clk_on(p); |
| } |
| /* turn clocks off? */ |
| if (blank > FB_BLANK_NORMAL && ch->blank_status <= FB_BLANK_NORMAL) { |
| /* make sure the screen is updated with the black fill before |
| * switching the clocks off. one vsync is not enough since |
| * blanking may occur in the middle of a refresh. deferred io |
| * mode will reenable the clocks and update the screen in time, |
| * so it does not need this. */ |
| if (!info->fbdefio) { |
| sh_mobile_wait_for_vsync(info); |
| sh_mobile_wait_for_vsync(info); |
| } |
| sh_mobile_lcdc_clk_off(p); |
| } |
| |
| ch->blank_status = blank; |
| return 0; |
| } |
| |
| static struct fb_ops sh_mobile_lcdc_ops = { |
| .owner = THIS_MODULE, |
| .fb_setcolreg = sh_mobile_lcdc_setcolreg, |
| .fb_read = fb_sys_read, |
| .fb_write = fb_sys_write, |
| .fb_fillrect = sh_mobile_lcdc_fillrect, |
| .fb_copyarea = sh_mobile_lcdc_copyarea, |
| .fb_imageblit = sh_mobile_lcdc_imageblit, |
| .fb_blank = sh_mobile_lcdc_blank, |
| .fb_pan_display = sh_mobile_fb_pan_display, |
| .fb_ioctl = sh_mobile_ioctl, |
| .fb_open = sh_mobile_open, |
| .fb_release = sh_mobile_release, |
| .fb_check_var = sh_mobile_check_var, |
| .fb_set_par = sh_mobile_set_par, |
| }; |
| |
| static int sh_mobile_lcdc_update_bl(struct backlight_device *bdev) |
| { |
| struct sh_mobile_lcdc_chan *ch = bl_get_data(bdev); |
| struct sh_mobile_lcdc_board_cfg *cfg = &ch->cfg.board_cfg; |
| int brightness = bdev->props.brightness; |
| |
| if (bdev->props.power != FB_BLANK_UNBLANK || |
| bdev->props.state & (BL_CORE_SUSPENDED | BL_CORE_FBBLANK)) |
| brightness = 0; |
| |
| return cfg->set_brightness(cfg->board_data, brightness); |
| } |
| |
| static int sh_mobile_lcdc_get_brightness(struct backlight_device *bdev) |
| { |
| struct sh_mobile_lcdc_chan *ch = bl_get_data(bdev); |
| struct sh_mobile_lcdc_board_cfg *cfg = &ch->cfg.board_cfg; |
| |
| return cfg->get_brightness(cfg->board_data); |
| } |
| |
| static int sh_mobile_lcdc_check_fb(struct backlight_device *bdev, |
| struct fb_info *info) |
| { |
| return (info->bl_dev == bdev); |
| } |
| |
| static struct backlight_ops sh_mobile_lcdc_bl_ops = { |
| .options = BL_CORE_SUSPENDRESUME, |
| .update_status = sh_mobile_lcdc_update_bl, |
| .get_brightness = sh_mobile_lcdc_get_brightness, |
| .check_fb = sh_mobile_lcdc_check_fb, |
| }; |
| |
| static struct backlight_device *sh_mobile_lcdc_bl_probe(struct device *parent, |
| struct sh_mobile_lcdc_chan *ch) |
| { |
| struct backlight_device *bl; |
| |
| bl = backlight_device_register(ch->cfg.bl_info.name, parent, ch, |
| &sh_mobile_lcdc_bl_ops, NULL); |
| if (IS_ERR(bl)) { |
| dev_err(parent, "unable to register backlight device: %ld\n", |
| PTR_ERR(bl)); |
| return NULL; |
| } |
| |
| bl->props.max_brightness = ch->cfg.bl_info.max_brightness; |
| bl->props.brightness = bl->props.max_brightness; |
| backlight_update_status(bl); |
| |
| return bl; |
| } |
| |
| static void sh_mobile_lcdc_bl_remove(struct backlight_device *bdev) |
| { |
| backlight_device_unregister(bdev); |
| } |
| |
| static int sh_mobile_lcdc_suspend(struct device *dev) |
| { |
| struct platform_device *pdev = to_platform_device(dev); |
| |
| sh_mobile_lcdc_stop(platform_get_drvdata(pdev)); |
| return 0; |
| } |
| |
| static int sh_mobile_lcdc_resume(struct device *dev) |
| { |
| struct platform_device *pdev = to_platform_device(dev); |
| |
| return sh_mobile_lcdc_start(platform_get_drvdata(pdev)); |
| } |
| |
| static int sh_mobile_lcdc_runtime_suspend(struct device *dev) |
| { |
| struct platform_device *pdev = to_platform_device(dev); |
| struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev); |
| |
| /* turn off LCDC hardware */ |
| lcdc_write(priv, _LDCNT1R, 0); |
| |
| return 0; |
| } |
| |
| static int sh_mobile_lcdc_runtime_resume(struct device *dev) |
| { |
| struct platform_device *pdev = to_platform_device(dev); |
| struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev); |
| |
| __sh_mobile_lcdc_start(priv); |
| |
| return 0; |
| } |
| |
| static const struct dev_pm_ops sh_mobile_lcdc_dev_pm_ops = { |
| .suspend = sh_mobile_lcdc_suspend, |
| .resume = sh_mobile_lcdc_resume, |
| .runtime_suspend = sh_mobile_lcdc_runtime_suspend, |
| .runtime_resume = sh_mobile_lcdc_runtime_resume, |
| }; |
| |
| /* locking: called with info->lock held */ |
| static int sh_mobile_lcdc_notify(struct notifier_block *nb, |
| unsigned long action, void *data) |
| { |
| struct fb_event *event = data; |
| struct fb_info *info = event->info; |
| struct sh_mobile_lcdc_chan *ch = info->par; |
| struct sh_mobile_lcdc_board_cfg *board_cfg = &ch->cfg.board_cfg; |
| |
| if (&ch->lcdc->notifier != nb) |
| return NOTIFY_DONE; |
| |
| dev_dbg(info->dev, "%s(): action = %lu, data = %p\n", |
| __func__, action, event->data); |
| |
| switch(action) { |
| case FB_EVENT_SUSPEND: |
| if (board_cfg->display_off && try_module_get(board_cfg->owner)) { |
| board_cfg->display_off(board_cfg->board_data); |
| module_put(board_cfg->owner); |
| } |
| sh_mobile_lcdc_stop(ch->lcdc); |
| break; |
| case FB_EVENT_RESUME: |
| mutex_lock(&ch->open_lock); |
| sh_mobile_fb_reconfig(info); |
| mutex_unlock(&ch->open_lock); |
| |
| /* HDMI must be enabled before LCDC configuration */ |
| if (board_cfg->display_on && try_module_get(board_cfg->owner)) { |
| board_cfg->display_on(board_cfg->board_data, info); |
| module_put(board_cfg->owner); |
| } |
| |
| sh_mobile_lcdc_start(ch->lcdc); |
| } |
| |
| return NOTIFY_OK; |
| } |
| |
| static int sh_mobile_lcdc_remove(struct platform_device *pdev) |
| { |
| struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev); |
| struct fb_info *info; |
| int i; |
| |
| fb_unregister_client(&priv->notifier); |
| |
| for (i = 0; i < ARRAY_SIZE(priv->ch); i++) |
| if (priv->ch[i].info && priv->ch[i].info->dev) |
| unregister_framebuffer(priv->ch[i].info); |
| |
| sh_mobile_lcdc_stop(priv); |
| |
| for (i = 0; i < ARRAY_SIZE(priv->ch); i++) { |
| info = priv->ch[i].info; |
| |
| if (!info || !info->device) |
| continue; |
| |
| if (priv->ch[i].sglist) |
| vfree(priv->ch[i].sglist); |
| |
| if (info->screen_base) |
| dma_free_coherent(&pdev->dev, info->fix.smem_len, |
| info->screen_base, |
| priv->ch[i].dma_handle); |
| fb_dealloc_cmap(&info->cmap); |
| framebuffer_release(info); |
| } |
| |
| for (i = 0; i < ARRAY_SIZE(priv->ch); i++) { |
| if (priv->ch[i].bl) |
| sh_mobile_lcdc_bl_remove(priv->ch[i].bl); |
| } |
| |
| if (priv->dot_clk) |
| clk_put(priv->dot_clk); |
| |
| if (priv->dev) |
| pm_runtime_disable(priv->dev); |
| |
| if (priv->base) |
| iounmap(priv->base); |
| |
| if (priv->irq) |
| free_irq(priv->irq, priv); |
| kfree(priv); |
| return 0; |
| } |
| |
| static int __devinit sh_mobile_lcdc_channel_init(struct sh_mobile_lcdc_chan *ch, |
| struct device *dev) |
| { |
| struct sh_mobile_lcdc_chan_cfg *cfg = &ch->cfg; |
| const struct fb_videomode *max_mode; |
| const struct fb_videomode *mode; |
| struct fb_var_screeninfo *var; |
| struct fb_info *info; |
| unsigned int max_size; |
| int num_cfg; |
| void *buf; |
| int ret; |
| int i; |
| |
| mutex_init(&ch->open_lock); |
| |
| /* Allocate the frame buffer device. */ |
| ch->info = framebuffer_alloc(0, dev); |
| if (!ch->info) { |
| dev_err(dev, "unable to allocate fb_info\n"); |
| return -ENOMEM; |
| } |
| |
| info = ch->info; |
| info->fbops = &sh_mobile_lcdc_ops; |
| info->par = ch; |
| info->pseudo_palette = &ch->pseudo_palette; |
| info->flags = FBINFO_FLAG_DEFAULT; |
| |
| /* Iterate through the modes to validate them and find the highest |
| * resolution. |
| */ |
| max_mode = NULL; |
| max_size = 0; |
| |
| for (i = 0, mode = cfg->lcd_cfg; i < cfg->num_cfg; i++, mode++) { |
| unsigned int size = mode->yres * mode->xres; |
| |
| /* NV12 buffers must have even number of lines */ |
| if ((cfg->nonstd) && cfg->bpp == 12 && |
| (mode->yres & 0x1)) { |
| dev_err(dev, "yres must be multiple of 2 for YCbCr420 " |
| "mode.\n"); |
| return -EINVAL; |
| } |
| |
| if (size > max_size) { |
| max_mode = mode; |
| max_size = size; |
| } |
| } |
| |
| if (!max_size) |
| max_size = MAX_XRES * MAX_YRES; |
| else |
| dev_dbg(dev, "Found largest videomode %ux%u\n", |
| max_mode->xres, max_mode->yres); |
| |
| /* Initialize fixed screen information. Restrict pan to 2 lines steps |
| * for NV12. |
| */ |
| info->fix = sh_mobile_lcdc_fix; |
| info->fix.smem_len = max_size * 2 * cfg->bpp / 8; |
| if (cfg->nonstd && cfg->bpp == 12) |
| info->fix.ypanstep = 2; |
| |
| /* Create the mode list. */ |
| if (cfg->lcd_cfg == NULL) { |
| mode = &default_720p; |
| num_cfg = 1; |
| } else { |
| mode = cfg->lcd_cfg; |
| num_cfg = cfg->num_cfg; |
| } |
| |
| fb_videomode_to_modelist(mode, num_cfg, &info->modelist); |
| |
| /* Initialize variable screen information using the first mode as |
| * default. The default Y virtual resolution is twice the panel size to |
| * allow for double-buffering. |
| */ |
| var = &info->var; |
| fb_videomode_to_var(var, mode); |
| var->bits_per_pixel = cfg->bpp; |
| var->width = cfg->lcd_size_cfg.width; |
| var->height = cfg->lcd_size_cfg.height; |
| var->yres_virtual = var->yres * 2; |
| var->activate = FB_ACTIVATE_NOW; |
| |
| ret = sh_mobile_check_var(var, info); |
| if (ret) |
| return ret; |
| |
| /* Allocate frame buffer memory and color map. */ |
| buf = dma_alloc_coherent(dev, info->fix.smem_len, &ch->dma_handle, |
| GFP_KERNEL); |
| if (!buf) { |
| dev_err(dev, "unable to allocate buffer\n"); |
| return -ENOMEM; |
| } |
| |
| ret = fb_alloc_cmap(&info->cmap, PALETTE_NR, 0); |
| if (ret < 0) { |
| dev_err(dev, "unable to allocate cmap\n"); |
| dma_free_coherent(dev, info->fix.smem_len, |
| buf, ch->dma_handle); |
| return ret; |
| } |
| |
| info->fix.smem_start = ch->dma_handle; |
| if (var->nonstd) |
| info->fix.line_length = var->xres; |
| else |
| info->fix.line_length = var->xres * (cfg->bpp / 8); |
| |
| info->screen_base = buf; |
| info->device = dev; |
| ch->display_var = *var; |
| |
| return 0; |
| } |
| |
| static int __devinit sh_mobile_lcdc_probe(struct platform_device *pdev) |
| { |
| struct sh_mobile_lcdc_info *pdata = pdev->dev.platform_data; |
| struct sh_mobile_lcdc_priv *priv; |
| struct resource *res; |
| int num_channels; |
| int error; |
| int i; |
| |
| if (!pdata) { |
| dev_err(&pdev->dev, "no platform data defined\n"); |
| return -EINVAL; |
| } |
| |
| res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| i = platform_get_irq(pdev, 0); |
| if (!res || i < 0) { |
| dev_err(&pdev->dev, "cannot get platform resources\n"); |
| return -ENOENT; |
| } |
| |
| priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
| if (!priv) { |
| dev_err(&pdev->dev, "cannot allocate device data\n"); |
| return -ENOMEM; |
| } |
| |
| platform_set_drvdata(pdev, priv); |
| |
| error = request_irq(i, sh_mobile_lcdc_irq, IRQF_DISABLED, |
| dev_name(&pdev->dev), priv); |
| if (error) { |
| dev_err(&pdev->dev, "unable to request irq\n"); |
| goto err1; |
| } |
| |
| priv->irq = i; |
| atomic_set(&priv->hw_usecnt, -1); |
| |
| for (i = 0, num_channels = 0; i < ARRAY_SIZE(pdata->ch); i++) { |
| struct sh_mobile_lcdc_chan *ch = priv->ch + num_channels; |
| |
| ch->lcdc = priv; |
| memcpy(&ch->cfg, &pdata->ch[i], sizeof(pdata->ch[i])); |
| |
| error = sh_mobile_lcdc_check_interface(ch); |
| if (error) { |
| dev_err(&pdev->dev, "unsupported interface type\n"); |
| goto err1; |
| } |
| init_waitqueue_head(&ch->frame_end_wait); |
| init_completion(&ch->vsync_completion); |
| ch->pan_offset = 0; |
| |
| /* probe the backlight is there is one defined */ |
| if (ch->cfg.bl_info.max_brightness) |
| ch->bl = sh_mobile_lcdc_bl_probe(&pdev->dev, ch); |
| |
| switch (pdata->ch[i].chan) { |
| case LCDC_CHAN_MAINLCD: |
| ch->enabled = LDCNT2R_ME; |
| ch->reg_offs = lcdc_offs_mainlcd; |
| num_channels++; |
| break; |
| case LCDC_CHAN_SUBLCD: |
| ch->enabled = LDCNT2R_SE; |
| ch->reg_offs = lcdc_offs_sublcd; |
| num_channels++; |
| break; |
| } |
| } |
| |
| if (!num_channels) { |
| dev_err(&pdev->dev, "no channels defined\n"); |
| error = -EINVAL; |
| goto err1; |
| } |
| |
| /* for dual channel LCDC (MAIN + SUB) force shared bpp setting */ |
| if (num_channels == 2) |
| priv->forced_bpp = pdata->ch[0].bpp; |
| |
| priv->base = ioremap_nocache(res->start, resource_size(res)); |
| if (!priv->base) |
| goto err1; |
| |
| error = sh_mobile_lcdc_setup_clocks(pdev, pdata->clock_source, priv); |
| if (error) { |
| dev_err(&pdev->dev, "unable to setup clocks\n"); |
| goto err1; |
| } |
| |
| priv->meram_dev = pdata->meram_dev; |
| |
| for (i = 0; i < num_channels; i++) { |
| struct sh_mobile_lcdc_chan *ch = priv->ch + i; |
| |
| error = sh_mobile_lcdc_channel_init(ch, &pdev->dev); |
| if (error) |
| goto err1; |
| } |
| |
| error = sh_mobile_lcdc_start(priv); |
| if (error) { |
| dev_err(&pdev->dev, "unable to start hardware\n"); |
| goto err1; |
| } |
| |
| for (i = 0; i < num_channels; i++) { |
| struct sh_mobile_lcdc_chan *ch = priv->ch + i; |
| struct fb_info *info = ch->info; |
| |
| if (info->fbdefio) { |
| ch->sglist = vmalloc(sizeof(struct scatterlist) * |
| info->fix.smem_len >> PAGE_SHIFT); |
| if (!ch->sglist) { |
| dev_err(&pdev->dev, "cannot allocate sglist\n"); |
| goto err1; |
| } |
| } |
| |
| info->bl_dev = ch->bl; |
| |
| error = register_framebuffer(info); |
| if (error < 0) |
| goto err1; |
| |
| dev_info(info->dev, |
| "registered %s/%s as %dx%d %dbpp.\n", |
| pdev->name, |
| (ch->cfg.chan == LCDC_CHAN_MAINLCD) ? |
| "mainlcd" : "sublcd", |
| info->var.xres, info->var.yres, |
| ch->cfg.bpp); |
| |
| /* deferred io mode: disable clock to save power */ |
| if (info->fbdefio || info->state == FBINFO_STATE_SUSPENDED) |
| sh_mobile_lcdc_clk_off(priv); |
| } |
| |
| /* Failure ignored */ |
| priv->notifier.notifier_call = sh_mobile_lcdc_notify; |
| fb_register_client(&priv->notifier); |
| |
| return 0; |
| err1: |
| sh_mobile_lcdc_remove(pdev); |
| |
| return error; |
| } |
| |
| static struct platform_driver sh_mobile_lcdc_driver = { |
| .driver = { |
| .name = "sh_mobile_lcdc_fb", |
| .owner = THIS_MODULE, |
| .pm = &sh_mobile_lcdc_dev_pm_ops, |
| }, |
| .probe = sh_mobile_lcdc_probe, |
| .remove = sh_mobile_lcdc_remove, |
| }; |
| |
| static int __init sh_mobile_lcdc_init(void) |
| { |
| return platform_driver_register(&sh_mobile_lcdc_driver); |
| } |
| |
| static void __exit sh_mobile_lcdc_exit(void) |
| { |
| platform_driver_unregister(&sh_mobile_lcdc_driver); |
| } |
| |
| module_init(sh_mobile_lcdc_init); |
| module_exit(sh_mobile_lcdc_exit); |
| |
| MODULE_DESCRIPTION("SuperH Mobile LCDC Framebuffer driver"); |
| MODULE_AUTHOR("Magnus Damm <damm@opensource.se>"); |
| MODULE_LICENSE("GPL v2"); |