diff options
Diffstat (limited to 'drivers/video/sh_mobile_lcdcfb.c')
| -rw-r--r-- | drivers/video/sh_mobile_lcdcfb.c | 1164 |
1 files changed, 0 insertions, 1164 deletions
diff --git a/drivers/video/sh_mobile_lcdcfb.c b/drivers/video/sh_mobile_lcdcfb.c deleted file mode 100644 index a69830d26f7..00000000000 --- a/drivers/video/sh_mobile_lcdcfb.c +++ /dev/null @@ -1,1164 +0,0 @@ -/* - * 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/fb.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 <video/sh_mobile_lcdc.h> -#include <asm/atomic.h> - -#define PALETTE_NR 16 -#define SIDE_B_OFFSET 0x1000 -#define MIRROR_OFFSET 0x2000 - -/* shared registers */ -#define _LDDCKR 0x410 -#define _LDDCKSTPR 0x414 -#define _LDINTR 0x468 -#define _LDSR 0x46c -#define _LDCNT1R 0x470 -#define _LDCNT2R 0x474 -#define _LDRCNTR 0x478 -#define _LDDDSR 0x47c -#define _LDDWD0R 0x800 -#define _LDDRDR 0x840 -#define _LDDWAR 0x900 -#define _LDDRAR 0x904 - -/* shared registers and their order for context save/restore */ -static int lcdc_shared_regs[] = { - _LDDCKR, - _LDDCKSTPR, - _LDINTR, - _LDDDSR, - _LDCNT1R, - _LDCNT2R, -}; -#define NR_SHARED_REGS ARRAY_SIZE(lcdc_shared_regs) - -/* per-channel registers */ -enum { LDDCKPAT1R, LDDCKPAT2R, LDMT1R, LDMT2R, LDMT3R, LDDFR, LDSM1R, - LDSM2R, LDSA1R, LDMLSR, LDHCNR, LDHSYNR, LDVLNR, LDVSYNR, LDPMR, - NR_CH_REGS }; - -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, - [LDMLSR] = 0x438, - [LDHCNR] = 0x448, - [LDHSYNR] = 0x44c, - [LDVLNR] = 0x450, - [LDVSYNR] = 0x454, - [LDPMR] = 0x460, -}; - -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, -}; - -#define START_LCDC 0x00000001 -#define LCDC_RESET 0x00000100 -#define DISPLAY_BEU 0x00000008 -#define LCDC_ENABLE 0x00000001 -#define LDINTR_FE 0x00000400 -#define LDINTR_VSE 0x00000200 -#define LDINTR_VEE 0x00000100 -#define LDINTR_FS 0x00000004 -#define LDINTR_VSS 0x00000002 -#define LDINTR_VES 0x00000001 -#define LDRCNTR_SRS 0x00020000 -#define LDRCNTR_SRC 0x00010000 -#define LDRCNTR_MRS 0x00000002 -#define LDRCNTR_MRC 0x00000001 - -struct sh_mobile_lcdc_priv; -struct sh_mobile_lcdc_chan { - struct sh_mobile_lcdc_priv *lcdc; - unsigned long *reg_offs; - unsigned long ldmt1r_value; - unsigned long enabled; /* ME and SE in LDCNT2R */ - struct sh_mobile_lcdc_chan_cfg cfg; - u32 pseudo_palette[PALETTE_NR]; - unsigned long saved_ch_regs[NR_CH_REGS]; - struct fb_info *info; - dma_addr_t dma_handle; - struct fb_deferred_io defio; - struct scatterlist *sglist; - unsigned long frame_end; - unsigned long pan_offset; - unsigned long new_pan_offset; - wait_queue_head_t frame_end_wait; -}; - -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]; - unsigned long saved_shared_regs[NR_SHARED_REGS]; - int started; -}; - -static bool banked(int reg_nr) -{ - switch (reg_nr) { - case LDMT1R: - case LDMT2R: - case LDMT3R: - case LDDFR: - case LDSM1R: - case LDSA1R: - 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 | 0x10000000); - lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0); - lcdc_write(ch->lcdc, _LDDWAR, 1 | (lcdc_chan_is_sublcd(ch) ? 2 : 0)); - lcdc_wait_bit(ch->lcdc, _LDSR, 2, 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 | 0x11000000); - lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0); - lcdc_write(ch->lcdc, _LDDWAR, 1 | (lcdc_chan_is_sublcd(ch) ? 2 : 0)); - lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0); -} - -static unsigned long lcdc_sys_read_data(void *handle) -{ - struct sh_mobile_lcdc_chan *ch = handle; - - lcdc_write(ch->lcdc, _LDDRDR, 0x01000000); - lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0); - lcdc_write(ch->lcdc, _LDDRAR, 1 | (lcdc_chan_is_sublcd(ch) ? 2 : 0)); - udelay(1); - lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0); - - return lcdc_read(ch->lcdc, _LDDRDR) & 0x3ffff; -} - -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)) { - pm_runtime_get_sync(priv->dev); - if (priv->dot_clk) - clk_enable(priv->dot_clk); - } -} - -static void sh_mobile_lcdc_clk_off(struct sh_mobile_lcdc_priv *priv) -{ - if (atomic_sub_return(1, &priv->hw_usecnt) == -1) { - if (priv->dot_clk) - clk_disable(priv->dot_clk); - pm_runtime_put(priv->dev); - } -} - -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, 1); - 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, 1); - } -} - -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 tmp; - unsigned long ldintr; - int is_sub; - int k; - - /* acknowledge interrupt */ - ldintr = tmp = lcdc_read(priv, _LDINTR); - /* - * disable further VSYNC End IRQs, preserve all other enabled IRQs, - * write 0 to bits 0-6 to ack all triggered IRQs. - */ - tmp &= 0xffffff00 & ~LDINTR_VEE; - lcdc_write(priv, _LDINTR, tmp); - - /* figure out if this interrupt is for main or sub lcd */ - is_sub = (lcdc_read(priv, _LDSR) & (1 << 10)) ? 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 Start */ - 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) { - unsigned long ldrcntr = lcdc_read(priv, _LDRCNTR); - /* Set the source address for the next refresh */ - lcdc_write_chan_mirror(ch, LDSA1R, ch->dma_handle + - ch->new_pan_offset); - 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 = ch->new_pan_offset; - } - } - - 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 | START_LCDC); - else - lcdc_write(priv, _LDCNT2R, tmp & ~START_LCDC); - - /* 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) & 3; - if (start && tmp == 3) - break; - if (!start && tmp == 0) - break; - cpu_relax(); - } - - if (!start) - lcdc_write(priv, _LDDCKSTPR, 1); /* stop dotclock */ -} - -static int sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv) -{ - struct sh_mobile_lcdc_chan *ch; - struct fb_videomode *lcd_cfg; - struct sh_mobile_lcdc_board_cfg *board_cfg; - unsigned long tmp; - int k, m; - int ret = 0; - - /* 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) | LCDC_RESET); - lcdc_wait_bit(priv, _LDCNT2R, LCDC_RESET, 0); - - /* enable LCDC channels */ - tmp = lcdc_read(priv, _LDCNT2R); - tmp |= priv->ch[0].enabled; - tmp |= priv->ch[1].enabled; - lcdc_write(priv, _LDCNT2R, tmp); - - /* read data from external memory, avoid using the BEU for now */ - lcdc_write(priv, _LDCNT2R, lcdc_read(priv, _LDCNT2R) & ~DISPLAY_BEU); - - /* stop the lcdc first */ - sh_mobile_lcdc_start_stop(priv, 0); - - /* configure clocks */ - tmp = priv->lddckr; - for (k = 0; k < ARRAY_SIZE(priv->ch); k++) { - ch = &priv->ch[k]; - - if (!priv->ch[k].enabled) - continue; - - m = ch->cfg.clock_divider; - if (!m) - continue; - - if (m == 1) - m = 1 << 6; - tmp |= m << (lcdc_chan_is_sublcd(ch) ? 8 : 0); - - lcdc_write_chan(ch, LDDCKPAT1R, 0x00000000); - lcdc_write_chan(ch, LDDCKPAT2R, (1 << (m/2)) - 1); - } - - lcdc_write(priv, _LDDCKR, tmp); - - /* start dotclock again */ - lcdc_write(priv, _LDDCKSTPR, 0); - lcdc_wait_bit(priv, _LDDCKSTPR, ~0, 0); - - /* interrupts are disabled to begin with */ - lcdc_write(priv, _LDINTR, 0); - - for (k = 0; k < ARRAY_SIZE(priv->ch); k++) { - ch = &priv->ch[k]; - lcd_cfg = &ch->cfg.lcd_cfg; - - if (!ch->enabled) - continue; - - tmp = ch->ldmt1r_value; - tmp |= (lcd_cfg->sync & FB_SYNC_VERT_HIGH_ACT) ? 0 : 1 << 28; - tmp |= (lcd_cfg->sync & FB_SYNC_HOR_HIGH_ACT) ? 0 : 1 << 27; - tmp |= (ch->cfg.flags & LCDC_FLAGS_DWPOL) ? 1 << 26 : 0; - tmp |= (ch->cfg.flags & LCDC_FLAGS_DIPOL) ? 1 << 25 : 0; - tmp |= (ch->cfg.flags & LCDC_FLAGS_DAPOL) ? 1 << 24 : 0; - tmp |= (ch->cfg.flags & LCDC_FLAGS_HSCNT) ? 1 << 17 : 0; - tmp |= (ch->cfg.flags & LCDC_FLAGS_DWCNT) ? 1 << 16 : 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 */ - tmp = lcd_cfg->xres + lcd_cfg->hsync_len; - tmp += lcd_cfg->left_margin; - tmp += lcd_cfg->right_margin; - tmp /= 8; /* HTCN */ - tmp |= (lcd_cfg->xres / 8) << 16; /* HDCN */ - lcdc_write_chan(ch, LDHCNR, tmp); - - tmp = lcd_cfg->xres; - tmp += lcd_cfg->right_margin; - tmp /= 8; /* HSYNP */ - tmp |= (lcd_cfg->hsync_len / 8) << 16; /* HSYNW */ - lcdc_write_chan(ch, LDHSYNR, tmp); - - /* power supply */ - lcdc_write_chan(ch, LDPMR, 0); - - /* vertical configuration */ - tmp = lcd_cfg->yres + lcd_cfg->vsync_len; - tmp += lcd_cfg->upper_margin; - tmp += lcd_cfg->lower_margin; /* VTLN */ - tmp |= lcd_cfg->yres << 16; /* VDLN */ - lcdc_write_chan(ch, LDVLNR, tmp); - - tmp = lcd_cfg->yres; - tmp += lcd_cfg->lower_margin; /* VSYNP */ - tmp |= lcd_cfg->vsync_len << 16; /* VSYNW */ - lcdc_write_chan(ch, LDVSYNR, tmp); - - 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; - } - - /* word and long word swap */ - lcdc_write(priv, _LDDDSR, lcdc_read(priv, _LDDDSR) | 6); - - for (k = 0; k < ARRAY_SIZE(priv->ch); k++) { - ch = &priv->ch[k]; - - if (!priv->ch[k].enabled) - continue; - - /* set bpp format in PKF[4:0] */ - tmp = lcdc_read_chan(ch, LDDFR); - tmp &= ~(0x0001001f); - tmp |= (ch->info->var.bits_per_pixel == 16) ? 3 : 0; - lcdc_write_chan(ch, LDDFR, tmp); - - /* point out our frame buffer */ - lcdc_write_chan(ch, LDSA1R, ch->info->fix.smem_start); - - /* set line size */ - lcdc_write_chan(ch, LDMLSR, ch->info->fix.line_length); - - /* setup deferred io if SYS bus */ - tmp = ch->cfg.sys_bus_cfg.deferred_io_msec; - if (ch->ldmt1r_value & (1 << 12) && 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); - - /* one-shot mode */ - lcdc_write_chan(ch, LDSM1R, 1); - - /* enable "Frame End Interrupt Enable" bit */ - lcdc_write(priv, _LDINTR, LDINTR_FE); - - } else { - /* continuous read mode */ - lcdc_write_chan(ch, LDSM1R, 0); - } - } - - /* display output */ - lcdc_write(priv, _LDCNT1R, LCDC_ENABLE); - - /* start the lcdc */ - sh_mobile_lcdc_start_stop(priv, 1); - priv->started = 1; - - /* tell the board code to enable the panel */ - 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->display_on) - board_cfg->display_on(board_cfg->board_data); - } - - 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->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); - } - - board_cfg = &ch->cfg.board_cfg; - if (board_cfg->display_off) - board_cfg->display_off(board_cfg->board_data); - } - - /* 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 ifm, miftyp; - - switch (ch->cfg.interface_type) { - case RGB8: ifm = 0; miftyp = 0; break; - case RGB9: ifm = 0; miftyp = 4; break; - case RGB12A: ifm = 0; miftyp = 5; break; - case RGB12B: ifm = 0; miftyp = 6; break; - case RGB16: ifm = 0; miftyp = 7; break; - case RGB18: ifm = 0; miftyp = 10; break; - case RGB24: ifm = 0; miftyp = 11; break; - case SYS8A: ifm = 1; miftyp = 0; break; - case SYS8B: ifm = 1; miftyp = 1; break; - case SYS8C: ifm = 1; miftyp = 2; break; - case SYS8D: ifm = 1; miftyp = 3; break; - case SYS9: ifm = 1; miftyp = 4; break; - case SYS12: ifm = 1; miftyp = 5; break; - case SYS16A: ifm = 1; miftyp = 7; break; - case SYS16B: ifm = 1; miftyp = 8; break; - case SYS16C: ifm = 1; miftyp = 9; break; - case SYS18: ifm = 1; miftyp = 10; break; - case SYS24: ifm = 1; miftyp = 11; break; - default: goto bad; - } - - /* SUBLCD only supports SYS interface */ - if (lcdc_chan_is_sublcd(ch)) { - if (ifm == 0) - goto bad; - else - ifm = 0; - } - - ch->ldmt1r_value = (ifm << 12) | miftyp; - return 0; - bad: - return -EINVAL; -} - -static int sh_mobile_lcdc_setup_clocks(struct platform_device *pdev, - int clock_source, - struct sh_mobile_lcdc_priv *priv) -{ - char *str; - int icksel; - - switch (clock_source) { - case LCDC_CLK_BUS: str = "bus_clk"; icksel = 0; break; - case LCDC_CLK_PERIPHERAL: str = "peripheral_clk"; icksel = 1; break; - case LCDC_CLK_EXTERNAL: str = NULL; icksel = 2; break; - default: - return -EINVAL; - } - - priv->lddckr = icksel << 16; - - 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); - } - } - atomic_set(&priv->hw_usecnt, -1); - - /* Runtime PM support involves two step for this driver: - * 1) Enable Runtime PM - * 2) Force Runtime PM Resume since hardware is accessed from probe() - */ - 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; - - if (info->var.xoffset == var->xoffset && - info->var.yoffset == var->yoffset) - return 0; /* No change, do nothing */ - - ch->new_pan_offset = (var->yoffset * info->fix.line_length) + - (var->xoffset * (info->var.bits_per_pixel / 8)); - - if (ch->new_pan_offset != ch->pan_offset) { - unsigned long ldintr; - ldintr = lcdc_read(ch->lcdc, _LDINTR); - ldintr |= LDINTR_VEE; - lcdc_write(ch->lcdc, _LDINTR, ldintr); - sh_mobile_lcdc_deferred_io_touch(info); - } - - 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_pan_display = sh_mobile_fb_pan_display, -}; - -static int sh_mobile_lcdc_set_bpp(struct fb_var_screeninfo *var, int bpp) -{ - switch (bpp) { - case 16: /* PKF[4:0] = 00011 - RGB 565 */ - 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; - break; - - case 32: /* PKF[4:0] = 00000 - RGB 888 - * sh7722 pdf says 00RRGGBB but reality is GGBB00RR - * this may be because LDDDSR has word swap enabled.. - */ - var->red.offset = 0; - var->red.length = 8; - var->green.offset = 24; - var->green.length = 8; - var->blue.offset = 16; - var->blue.length = 8; - var->transp.offset = 0; - var->transp.length = 0; - break; - default: - return -EINVAL; - } - var->bits_per_pixel = bpp; - var->red.msb_right = 0; - var->green.msb_right = 0; - var->blue.msb_right = 0; - var->transp.msb_right = 0; - return 0; -} - -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 *p = platform_get_drvdata(pdev); - struct sh_mobile_lcdc_chan *ch; - int k, n; - - /* save per-channel registers */ - for (k = 0; k < ARRAY_SIZE(p->ch); k++) { - ch = &p->ch[k]; - if (!ch->enabled) - continue; - for (n = 0; n < NR_CH_REGS; n++) - ch->saved_ch_regs[n] = lcdc_read_chan(ch, n); - } - - /* save shared registers */ - for (n = 0; n < NR_SHARED_REGS; n++) - p->saved_shared_regs[n] = lcdc_read(p, lcdc_shared_regs[n]); - - /* turn off LCDC hardware */ - lcdc_write(p, _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 *p = platform_get_drvdata(pdev); - struct sh_mobile_lcdc_chan *ch; - int k, n; - - /* restore per-channel registers */ - for (k = 0; k < ARRAY_SIZE(p->ch); k++) { - ch = &p->ch[k]; - if (!ch->enabled) - continue; - for (n = 0; n < NR_CH_REGS; n++) - lcdc_write_chan(ch, n, ch->saved_ch_regs[n]); - } - - /* restore shared registers */ - for (n = 0; n < NR_SHARED_REGS; n++) - lcdc_write(p, lcdc_shared_regs[n], p->saved_shared_regs[n]); - - 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, -}; - -static int sh_mobile_lcdc_remove(struct platform_device *pdev); - -static int __init sh_mobile_lcdc_probe(struct platform_device *pdev) -{ - struct fb_info *info; - struct sh_mobile_lcdc_priv *priv; - struct sh_mobile_lcdc_info *pdata; - struct sh_mobile_lcdc_chan_cfg *cfg; - struct resource *res; - int error; - void *buf; - int i, j; - - if (!pdev->dev.platform_data) { - dev_err(&pdev->dev, "no platform data defined\n"); - error = -EINVAL; - goto err0; - } - - 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"); - error = -ENOENT; - goto err0; - } - - priv = kzalloc(sizeof(*priv), GFP_KERNEL); - if (!priv) { - dev_err(&pdev->dev, "cannot allocate device data\n"); - error = -ENOMEM; - goto err0; - } - - 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; - priv->dev = &pdev->dev; - platform_set_drvdata(pdev, priv); - pdata = pdev->dev.platform_data; - - j = 0; - for (i = 0; i < ARRAY_SIZE(pdata->ch); i++) { - priv->ch[j].lcdc = priv; - memcpy(&priv->ch[j].cfg, &pdata->ch[i], sizeof(pdata->ch[i])); - - error = sh_mobile_lcdc_check_interface(&priv->ch[i]); - if (error) { - dev_err(&pdev->dev, "unsupported interface type\n"); - goto err1; - } - init_waitqueue_head(&priv->ch[i].frame_end_wait); - priv->ch[j].pan_offset = 0; - priv->ch[j].new_pan_offset = 0; - - switch (pdata->ch[i].chan) { - case LCDC_CHAN_MAINLCD: - priv->ch[j].enabled = 1 << 1; - priv->ch[j].reg_offs = lcdc_offs_mainlcd; - j++; - break; - case LCDC_CHAN_SUBLCD: - priv->ch[j].enabled = 1 << 2; - priv->ch[j].reg_offs = lcdc_offs_sublcd; - j++; - break; - } - } - - if (!j) { - dev_err(&pdev->dev, "no channels defined\n"); - error = -EINVAL; - 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->base = ioremap_nocache(res->start, (res->end - res->start) + 1); - - for (i = 0; i < j; i++) { - cfg = &priv->ch[i].cfg; - - priv->ch[i].info = framebuffer_alloc(0, &pdev->dev); - if (!priv->ch[i].info) { - dev_err(&pdev->dev, "unable to allocate fb_info\n"); - error = -ENOMEM; - break; - } - - info = priv->ch[i].info; - info->fbops = &sh_mobile_lcdc_ops; - info->var.xres = info->var.xres_virtual = cfg->lcd_cfg.xres; - info->var.yres = cfg->lcd_cfg.yres; - /* Default Y virtual resolution is 2x panel size */ - info->var.yres_virtual = info->var.yres * 2; - info->var.width = cfg->lcd_size_cfg.width; - info->var.height = cfg->lcd_size_cfg.height; - info->var.activate = FB_ACTIVATE_NOW; - error = sh_mobile_lcdc_set_bpp(&info->var, cfg->bpp); - if (error) - break; - - info->fix = sh_mobile_lcdc_fix; - info->fix.line_length = cfg->lcd_cfg.xres * (cfg->bpp / 8); - info->fix.smem_len = info->fix.line_length * - info->var.yres_virtual; - - buf = dma_alloc_coherent(&pdev->dev, info->fix.smem_len, - &priv->ch[i].dma_handle, GFP_KERNEL); - if (!buf) { - dev_err(&pdev->dev, "unable to allocate buffer\n"); - error = -ENOMEM; - break; - } - - info->pseudo_palette = &priv->ch[i].pseudo_palette; - info->flags = FBINFO_FLAG_DEFAULT; - - error = fb_alloc_cmap(&info->cmap, PALETTE_NR, 0); - if (error < 0) { - dev_err(&pdev->dev, "unable to allocate cmap\n"); - dma_free_coherent(&pdev->dev, info->fix.smem_len, - buf, priv->ch[i].dma_handle); - break; - } - - memset(buf, 0, info->fix.smem_len); - info->fix.smem_start = priv->ch[i].dma_handle; - info->screen_base = buf; - info->device = &pdev->dev; - info->par = &priv->ch[i]; - } - - 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 < j; i++) { - struct sh_mobile_lcdc_chan *ch = priv->ch + i; - - info = ch->info; - - if (info->fbdefio) { - priv->ch->sglist = vmalloc(sizeof(struct scatterlist) * - info->fix.smem_len >> PAGE_SHIFT); - if (!priv->ch->sglist) { - dev_err(&pdev->dev, "cannot allocate sglist\n"); - goto err1; - } - } - - 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", - (int) ch->cfg.lcd_cfg.xres, - (int) ch->cfg.lcd_cfg.yres, - ch->cfg.bpp); - - /* deferred io mode: disable clock to save power */ - if (info->fbdefio) - sh_mobile_lcdc_clk_off(priv); - } - - return 0; - err1: - sh_mobile_lcdc_remove(pdev); - err0: - return error; -} - -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; - - for (i = 0; i < ARRAY_SIZE(priv->ch); i++) - if (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); - - 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); - } - - if (priv->dot_clk) - clk_put(priv->dot_clk); - - pm_runtime_disable(priv->dev); - - if (priv->base) - iounmap(priv->base); - - if (priv->irq) - free_irq(priv->irq, priv); - kfree(priv); - return 0; -} - -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"); |