diff options
Diffstat (limited to 'kernel/drivers/video/fbdev/omap2/dss/rfbi.c')
| -rw-r--r-- | kernel/drivers/video/fbdev/omap2/dss/rfbi.c | 1058 |
1 files changed, 1058 insertions, 0 deletions
diff --git a/kernel/drivers/video/fbdev/omap2/dss/rfbi.c b/kernel/drivers/video/fbdev/omap2/dss/rfbi.c new file mode 100644 index 000000000..065effca9 --- /dev/null +++ b/kernel/drivers/video/fbdev/omap2/dss/rfbi.c @@ -0,0 +1,1058 @@ +/* + * linux/drivers/video/omap2/dss/rfbi.c + * + * Copyright (C) 2009 Nokia Corporation + * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com> + * + * Some code and ideas taken from drivers/video/omap/ driver + * by Imre Deak. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published by + * the Free Software Foundation. + * + * 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, see <http://www.gnu.org/licenses/>. + */ + +#define DSS_SUBSYS_NAME "RFBI" + +#include <linux/kernel.h> +#include <linux/dma-mapping.h> +#include <linux/export.h> +#include <linux/vmalloc.h> +#include <linux/clk.h> +#include <linux/io.h> +#include <linux/delay.h> +#include <linux/kfifo.h> +#include <linux/ktime.h> +#include <linux/hrtimer.h> +#include <linux/seq_file.h> +#include <linux/semaphore.h> +#include <linux/platform_device.h> +#include <linux/pm_runtime.h> + +#include <video/omapdss.h> +#include "dss.h" + +struct rfbi_reg { u16 idx; }; + +#define RFBI_REG(idx) ((const struct rfbi_reg) { idx }) + +#define RFBI_REVISION RFBI_REG(0x0000) +#define RFBI_SYSCONFIG RFBI_REG(0x0010) +#define RFBI_SYSSTATUS RFBI_REG(0x0014) +#define RFBI_CONTROL RFBI_REG(0x0040) +#define RFBI_PIXEL_CNT RFBI_REG(0x0044) +#define RFBI_LINE_NUMBER RFBI_REG(0x0048) +#define RFBI_CMD RFBI_REG(0x004c) +#define RFBI_PARAM RFBI_REG(0x0050) +#define RFBI_DATA RFBI_REG(0x0054) +#define RFBI_READ RFBI_REG(0x0058) +#define RFBI_STATUS RFBI_REG(0x005c) + +#define RFBI_CONFIG(n) RFBI_REG(0x0060 + (n)*0x18) +#define RFBI_ONOFF_TIME(n) RFBI_REG(0x0064 + (n)*0x18) +#define RFBI_CYCLE_TIME(n) RFBI_REG(0x0068 + (n)*0x18) +#define RFBI_DATA_CYCLE1(n) RFBI_REG(0x006c + (n)*0x18) +#define RFBI_DATA_CYCLE2(n) RFBI_REG(0x0070 + (n)*0x18) +#define RFBI_DATA_CYCLE3(n) RFBI_REG(0x0074 + (n)*0x18) + +#define RFBI_VSYNC_WIDTH RFBI_REG(0x0090) +#define RFBI_HSYNC_WIDTH RFBI_REG(0x0094) + +#define REG_FLD_MOD(idx, val, start, end) \ + rfbi_write_reg(idx, FLD_MOD(rfbi_read_reg(idx), val, start, end)) + +enum omap_rfbi_cycleformat { + OMAP_DSS_RFBI_CYCLEFORMAT_1_1 = 0, + OMAP_DSS_RFBI_CYCLEFORMAT_2_1 = 1, + OMAP_DSS_RFBI_CYCLEFORMAT_3_1 = 2, + OMAP_DSS_RFBI_CYCLEFORMAT_3_2 = 3, +}; + +enum omap_rfbi_datatype { + OMAP_DSS_RFBI_DATATYPE_12 = 0, + OMAP_DSS_RFBI_DATATYPE_16 = 1, + OMAP_DSS_RFBI_DATATYPE_18 = 2, + OMAP_DSS_RFBI_DATATYPE_24 = 3, +}; + +enum omap_rfbi_parallelmode { + OMAP_DSS_RFBI_PARALLELMODE_8 = 0, + OMAP_DSS_RFBI_PARALLELMODE_9 = 1, + OMAP_DSS_RFBI_PARALLELMODE_12 = 2, + OMAP_DSS_RFBI_PARALLELMODE_16 = 3, +}; + +static int rfbi_convert_timings(struct rfbi_timings *t); +static void rfbi_get_clk_info(u32 *clk_period, u32 *max_clk_div); + +static struct { + struct platform_device *pdev; + void __iomem *base; + + unsigned long l4_khz; + + enum omap_rfbi_datatype datatype; + enum omap_rfbi_parallelmode parallelmode; + + enum omap_rfbi_te_mode te_mode; + int te_enabled; + + void (*framedone_callback)(void *data); + void *framedone_callback_data; + + struct omap_dss_device *dssdev[2]; + + struct semaphore bus_lock; + + struct omap_video_timings timings; + int pixel_size; + int data_lines; + struct rfbi_timings intf_timings; + + struct omap_dss_device output; +} rfbi; + +static inline void rfbi_write_reg(const struct rfbi_reg idx, u32 val) +{ + __raw_writel(val, rfbi.base + idx.idx); +} + +static inline u32 rfbi_read_reg(const struct rfbi_reg idx) +{ + return __raw_readl(rfbi.base + idx.idx); +} + +static int rfbi_runtime_get(void) +{ + int r; + + DSSDBG("rfbi_runtime_get\n"); + + r = pm_runtime_get_sync(&rfbi.pdev->dev); + WARN_ON(r < 0); + return r < 0 ? r : 0; +} + +static void rfbi_runtime_put(void) +{ + int r; + + DSSDBG("rfbi_runtime_put\n"); + + r = pm_runtime_put_sync(&rfbi.pdev->dev); + WARN_ON(r < 0 && r != -ENOSYS); +} + +static void rfbi_bus_lock(void) +{ + down(&rfbi.bus_lock); +} + +static void rfbi_bus_unlock(void) +{ + up(&rfbi.bus_lock); +} + +static void rfbi_write_command(const void *buf, u32 len) +{ + switch (rfbi.parallelmode) { + case OMAP_DSS_RFBI_PARALLELMODE_8: + { + const u8 *b = buf; + for (; len; len--) + rfbi_write_reg(RFBI_CMD, *b++); + break; + } + + case OMAP_DSS_RFBI_PARALLELMODE_16: + { + const u16 *w = buf; + BUG_ON(len & 1); + for (; len; len -= 2) + rfbi_write_reg(RFBI_CMD, *w++); + break; + } + + case OMAP_DSS_RFBI_PARALLELMODE_9: + case OMAP_DSS_RFBI_PARALLELMODE_12: + default: + BUG(); + } +} + +static void rfbi_read_data(void *buf, u32 len) +{ + switch (rfbi.parallelmode) { + case OMAP_DSS_RFBI_PARALLELMODE_8: + { + u8 *b = buf; + for (; len; len--) { + rfbi_write_reg(RFBI_READ, 0); + *b++ = rfbi_read_reg(RFBI_READ); + } + break; + } + + case OMAP_DSS_RFBI_PARALLELMODE_16: + { + u16 *w = buf; + BUG_ON(len & ~1); + for (; len; len -= 2) { + rfbi_write_reg(RFBI_READ, 0); + *w++ = rfbi_read_reg(RFBI_READ); + } + break; + } + + case OMAP_DSS_RFBI_PARALLELMODE_9: + case OMAP_DSS_RFBI_PARALLELMODE_12: + default: + BUG(); + } +} + +static void rfbi_write_data(const void *buf, u32 len) +{ + switch (rfbi.parallelmode) { + case OMAP_DSS_RFBI_PARALLELMODE_8: + { + const u8 *b = buf; + for (; len; len--) + rfbi_write_reg(RFBI_PARAM, *b++); + break; + } + + case OMAP_DSS_RFBI_PARALLELMODE_16: + { + const u16 *w = buf; + BUG_ON(len & 1); + for (; len; len -= 2) + rfbi_write_reg(RFBI_PARAM, *w++); + break; + } + + case OMAP_DSS_RFBI_PARALLELMODE_9: + case OMAP_DSS_RFBI_PARALLELMODE_12: + default: + BUG(); + + } +} + +static void rfbi_write_pixels(const void __iomem *buf, int scr_width, + u16 x, u16 y, + u16 w, u16 h) +{ + int start_offset = scr_width * y + x; + int horiz_offset = scr_width - w; + int i; + + if (rfbi.datatype == OMAP_DSS_RFBI_DATATYPE_16 && + rfbi.parallelmode == OMAP_DSS_RFBI_PARALLELMODE_8) { + const u16 __iomem *pd = buf; + pd += start_offset; + + for (; h; --h) { + for (i = 0; i < w; ++i) { + const u8 __iomem *b = (const u8 __iomem *)pd; + rfbi_write_reg(RFBI_PARAM, __raw_readb(b+1)); + rfbi_write_reg(RFBI_PARAM, __raw_readb(b+0)); + ++pd; + } + pd += horiz_offset; + } + } else if (rfbi.datatype == OMAP_DSS_RFBI_DATATYPE_24 && + rfbi.parallelmode == OMAP_DSS_RFBI_PARALLELMODE_8) { + const u32 __iomem *pd = buf; + pd += start_offset; + + for (; h; --h) { + for (i = 0; i < w; ++i) { + const u8 __iomem *b = (const u8 __iomem *)pd; + rfbi_write_reg(RFBI_PARAM, __raw_readb(b+2)); + rfbi_write_reg(RFBI_PARAM, __raw_readb(b+1)); + rfbi_write_reg(RFBI_PARAM, __raw_readb(b+0)); + ++pd; + } + pd += horiz_offset; + } + } else if (rfbi.datatype == OMAP_DSS_RFBI_DATATYPE_16 && + rfbi.parallelmode == OMAP_DSS_RFBI_PARALLELMODE_16) { + const u16 __iomem *pd = buf; + pd += start_offset; + + for (; h; --h) { + for (i = 0; i < w; ++i) { + rfbi_write_reg(RFBI_PARAM, __raw_readw(pd)); + ++pd; + } + pd += horiz_offset; + } + } else { + BUG(); + } +} + +static int rfbi_transfer_area(struct omap_dss_device *dssdev, + void (*callback)(void *data), void *data) +{ + u32 l; + int r; + struct omap_overlay_manager *mgr = rfbi.output.manager; + u16 width = rfbi.timings.x_res; + u16 height = rfbi.timings.y_res; + + /*BUG_ON(callback == 0);*/ + BUG_ON(rfbi.framedone_callback != NULL); + + DSSDBG("rfbi_transfer_area %dx%d\n", width, height); + + dss_mgr_set_timings(mgr, &rfbi.timings); + + r = dss_mgr_enable(mgr); + if (r) + return r; + + rfbi.framedone_callback = callback; + rfbi.framedone_callback_data = data; + + rfbi_write_reg(RFBI_PIXEL_CNT, width * height); + + l = rfbi_read_reg(RFBI_CONTROL); + l = FLD_MOD(l, 1, 0, 0); /* enable */ + if (!rfbi.te_enabled) + l = FLD_MOD(l, 1, 4, 4); /* ITE */ + + rfbi_write_reg(RFBI_CONTROL, l); + + return 0; +} + +static void framedone_callback(void *data) +{ + void (*callback)(void *data); + + DSSDBG("FRAMEDONE\n"); + + REG_FLD_MOD(RFBI_CONTROL, 0, 0, 0); + + callback = rfbi.framedone_callback; + rfbi.framedone_callback = NULL; + + if (callback != NULL) + callback(rfbi.framedone_callback_data); +} + +#if 1 /* VERBOSE */ +static void rfbi_print_timings(void) +{ + u32 l; + u32 time; + + l = rfbi_read_reg(RFBI_CONFIG(0)); + time = 1000000000 / rfbi.l4_khz; + if (l & (1 << 4)) + time *= 2; + + DSSDBG("Tick time %u ps\n", time); + l = rfbi_read_reg(RFBI_ONOFF_TIME(0)); + DSSDBG("CSONTIME %d, CSOFFTIME %d, WEONTIME %d, WEOFFTIME %d, " + "REONTIME %d, REOFFTIME %d\n", + l & 0x0f, (l >> 4) & 0x3f, (l >> 10) & 0x0f, (l >> 14) & 0x3f, + (l >> 20) & 0x0f, (l >> 24) & 0x3f); + + l = rfbi_read_reg(RFBI_CYCLE_TIME(0)); + DSSDBG("WECYCLETIME %d, RECYCLETIME %d, CSPULSEWIDTH %d, " + "ACCESSTIME %d\n", + (l & 0x3f), (l >> 6) & 0x3f, (l >> 12) & 0x3f, + (l >> 22) & 0x3f); +} +#else +static void rfbi_print_timings(void) {} +#endif + + + + +static u32 extif_clk_period; + +static inline unsigned long round_to_extif_ticks(unsigned long ps, int div) +{ + int bus_tick = extif_clk_period * div; + return (ps + bus_tick - 1) / bus_tick * bus_tick; +} + +static int calc_reg_timing(struct rfbi_timings *t, int div) +{ + t->clk_div = div; + + t->cs_on_time = round_to_extif_ticks(t->cs_on_time, div); + + t->we_on_time = round_to_extif_ticks(t->we_on_time, div); + t->we_off_time = round_to_extif_ticks(t->we_off_time, div); + t->we_cycle_time = round_to_extif_ticks(t->we_cycle_time, div); + + t->re_on_time = round_to_extif_ticks(t->re_on_time, div); + t->re_off_time = round_to_extif_ticks(t->re_off_time, div); + t->re_cycle_time = round_to_extif_ticks(t->re_cycle_time, div); + + t->access_time = round_to_extif_ticks(t->access_time, div); + t->cs_off_time = round_to_extif_ticks(t->cs_off_time, div); + t->cs_pulse_width = round_to_extif_ticks(t->cs_pulse_width, div); + + DSSDBG("[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); + DSSDBG("[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); + DSSDBG("[reg]rdaccess %d cspulse %d\n", + t->access_time, t->cs_pulse_width); + + return rfbi_convert_timings(t); +} + +static int calc_extif_timings(struct rfbi_timings *t) +{ + u32 max_clk_div; + int div; + + rfbi_get_clk_info(&extif_clk_period, &max_clk_div); + for (div = 1; div <= max_clk_div; div++) { + if (calc_reg_timing(t, div) == 0) + break; + } + + if (div <= max_clk_div) + return 0; + + DSSERR("can't setup timings\n"); + return -1; +} + + +static void rfbi_set_timings(int rfbi_module, struct rfbi_timings *t) +{ + int r; + + if (!t->converted) { + r = calc_extif_timings(t); + if (r < 0) + DSSERR("Failed to calc timings\n"); + } + + BUG_ON(!t->converted); + + rfbi_write_reg(RFBI_ONOFF_TIME(rfbi_module), t->tim[0]); + rfbi_write_reg(RFBI_CYCLE_TIME(rfbi_module), t->tim[1]); + + /* TIMEGRANULARITY */ + REG_FLD_MOD(RFBI_CONFIG(rfbi_module), + (t->tim[2] ? 1 : 0), 4, 4); + + rfbi_print_timings(); +} + +static int ps_to_rfbi_ticks(int time, int div) +{ + unsigned long tick_ps; + int ret; + + /* Calculate in picosecs to yield more exact results */ + tick_ps = 1000000000 / (rfbi.l4_khz) * div; + + ret = (time + tick_ps - 1) / tick_ps; + + return ret; +} + +static void rfbi_get_clk_info(u32 *clk_period, u32 *max_clk_div) +{ + *clk_period = 1000000000 / rfbi.l4_khz; + *max_clk_div = 2; +} + +static int rfbi_convert_timings(struct rfbi_timings *t) +{ + u32 l; + int reon, reoff, weon, weoff, cson, csoff, cs_pulse; + int actim, recyc, wecyc; + int div = t->clk_div; + + if (div <= 0 || div > 2) + return -1; + + /* Make sure that after conversion it still holds that: + * weoff > weon, reoff > reon, recyc >= reoff, wecyc >= weoff, + * csoff > cson, csoff >= max(weoff, reoff), actim > reon + */ + weon = ps_to_rfbi_ticks(t->we_on_time, div); + weoff = ps_to_rfbi_ticks(t->we_off_time, div); + if (weoff <= weon) + weoff = weon + 1; + if (weon > 0x0f) + return -1; + if (weoff > 0x3f) + return -1; + + reon = ps_to_rfbi_ticks(t->re_on_time, div); + reoff = ps_to_rfbi_ticks(t->re_off_time, div); + if (reoff <= reon) + reoff = reon + 1; + if (reon > 0x0f) + return -1; + if (reoff > 0x3f) + return -1; + + cson = ps_to_rfbi_ticks(t->cs_on_time, div); + csoff = ps_to_rfbi_ticks(t->cs_off_time, div); + if (csoff <= cson) + csoff = cson + 1; + if (csoff < max(weoff, reoff)) + csoff = max(weoff, reoff); + if (cson > 0x0f) + return -1; + if (csoff > 0x3f) + return -1; + + l = cson; + l |= csoff << 4; + l |= weon << 10; + l |= weoff << 14; + l |= reon << 20; + l |= reoff << 24; + + t->tim[0] = l; + + actim = ps_to_rfbi_ticks(t->access_time, div); + if (actim <= reon) + actim = reon + 1; + if (actim > 0x3f) + return -1; + + wecyc = ps_to_rfbi_ticks(t->we_cycle_time, div); + if (wecyc < weoff) + wecyc = weoff; + if (wecyc > 0x3f) + return -1; + + recyc = ps_to_rfbi_ticks(t->re_cycle_time, div); + if (recyc < reoff) + recyc = reoff; + if (recyc > 0x3f) + return -1; + + cs_pulse = ps_to_rfbi_ticks(t->cs_pulse_width, div); + if (cs_pulse > 0x3f) + return -1; + + l = wecyc; + l |= recyc << 6; + l |= cs_pulse << 12; + l |= actim << 22; + + t->tim[1] = l; + + t->tim[2] = div - 1; + + t->converted = 1; + + return 0; +} + +/* xxx FIX module selection missing */ +static int rfbi_setup_te(enum omap_rfbi_te_mode mode, + unsigned hs_pulse_time, unsigned vs_pulse_time, + int hs_pol_inv, int vs_pol_inv, int extif_div) +{ + int hs, vs; + int min; + u32 l; + + hs = ps_to_rfbi_ticks(hs_pulse_time, 1); + vs = ps_to_rfbi_ticks(vs_pulse_time, 1); + if (hs < 2) + return -EDOM; + if (mode == OMAP_DSS_RFBI_TE_MODE_2) + min = 2; + else /* OMAP_DSS_RFBI_TE_MODE_1 */ + min = 4; + if (vs < min) + return -EDOM; + if (vs == hs) + return -EINVAL; + rfbi.te_mode = mode; + DSSDBG("setup_te: mode %d hs %d vs %d hs_inv %d vs_inv %d\n", + mode, hs, vs, hs_pol_inv, vs_pol_inv); + + rfbi_write_reg(RFBI_HSYNC_WIDTH, hs); + rfbi_write_reg(RFBI_VSYNC_WIDTH, vs); + + l = rfbi_read_reg(RFBI_CONFIG(0)); + if (hs_pol_inv) + l &= ~(1 << 21); + else + l |= 1 << 21; + if (vs_pol_inv) + l &= ~(1 << 20); + else + l |= 1 << 20; + + return 0; +} + +/* xxx FIX module selection missing */ +static int rfbi_enable_te(bool enable, unsigned line) +{ + u32 l; + + DSSDBG("te %d line %d mode %d\n", enable, line, rfbi.te_mode); + if (line > (1 << 11) - 1) + return -EINVAL; + + l = rfbi_read_reg(RFBI_CONFIG(0)); + l &= ~(0x3 << 2); + if (enable) { + rfbi.te_enabled = 1; + l |= rfbi.te_mode << 2; + } else + rfbi.te_enabled = 0; + rfbi_write_reg(RFBI_CONFIG(0), l); + rfbi_write_reg(RFBI_LINE_NUMBER, line); + + return 0; +} + +static int rfbi_configure_bus(int rfbi_module, int bpp, int lines) +{ + u32 l; + int cycle1 = 0, cycle2 = 0, cycle3 = 0; + enum omap_rfbi_cycleformat cycleformat; + enum omap_rfbi_datatype datatype; + enum omap_rfbi_parallelmode parallelmode; + + switch (bpp) { + case 12: + datatype = OMAP_DSS_RFBI_DATATYPE_12; + break; + case 16: + datatype = OMAP_DSS_RFBI_DATATYPE_16; + break; + case 18: + datatype = OMAP_DSS_RFBI_DATATYPE_18; + break; + case 24: + datatype = OMAP_DSS_RFBI_DATATYPE_24; + break; + default: + BUG(); + return 1; + } + rfbi.datatype = datatype; + + switch (lines) { + case 8: + parallelmode = OMAP_DSS_RFBI_PARALLELMODE_8; + break; + case 9: + parallelmode = OMAP_DSS_RFBI_PARALLELMODE_9; + break; + case 12: + parallelmode = OMAP_DSS_RFBI_PARALLELMODE_12; + break; + case 16: + parallelmode = OMAP_DSS_RFBI_PARALLELMODE_16; + break; + default: + BUG(); + return 1; + } + rfbi.parallelmode = parallelmode; + + if ((bpp % lines) == 0) { + switch (bpp / lines) { + case 1: + cycleformat = OMAP_DSS_RFBI_CYCLEFORMAT_1_1; + break; + case 2: + cycleformat = OMAP_DSS_RFBI_CYCLEFORMAT_2_1; + break; + case 3: + cycleformat = OMAP_DSS_RFBI_CYCLEFORMAT_3_1; + break; + default: + BUG(); + return 1; + } + } else if ((2 * bpp % lines) == 0) { + if ((2 * bpp / lines) == 3) + cycleformat = OMAP_DSS_RFBI_CYCLEFORMAT_3_2; + else { + BUG(); + return 1; + } + } else { + BUG(); + return 1; + } + + switch (cycleformat) { + case OMAP_DSS_RFBI_CYCLEFORMAT_1_1: + cycle1 = lines; + break; + + case OMAP_DSS_RFBI_CYCLEFORMAT_2_1: + cycle1 = lines; + cycle2 = lines; + break; + + case OMAP_DSS_RFBI_CYCLEFORMAT_3_1: + cycle1 = lines; + cycle2 = lines; + cycle3 = lines; + break; + + case OMAP_DSS_RFBI_CYCLEFORMAT_3_2: + cycle1 = lines; + cycle2 = (lines / 2) | ((lines / 2) << 16); + cycle3 = (lines << 16); + break; + } + + REG_FLD_MOD(RFBI_CONTROL, 0, 3, 2); /* clear CS */ + + l = 0; + l |= FLD_VAL(parallelmode, 1, 0); + l |= FLD_VAL(0, 3, 2); /* TRIGGERMODE: ITE */ + l |= FLD_VAL(0, 4, 4); /* TIMEGRANULARITY */ + l |= FLD_VAL(datatype, 6, 5); + /* l |= FLD_VAL(2, 8, 7); */ /* L4FORMAT, 2pix/L4 */ + l |= FLD_VAL(0, 8, 7); /* L4FORMAT, 1pix/L4 */ + l |= FLD_VAL(cycleformat, 10, 9); + l |= FLD_VAL(0, 12, 11); /* UNUSEDBITS */ + l |= FLD_VAL(0, 16, 16); /* A0POLARITY */ + l |= FLD_VAL(0, 17, 17); /* REPOLARITY */ + l |= FLD_VAL(0, 18, 18); /* WEPOLARITY */ + l |= FLD_VAL(0, 19, 19); /* CSPOLARITY */ + l |= FLD_VAL(1, 20, 20); /* TE_VSYNC_POLARITY */ + l |= FLD_VAL(1, 21, 21); /* HSYNCPOLARITY */ + rfbi_write_reg(RFBI_CONFIG(rfbi_module), l); + + rfbi_write_reg(RFBI_DATA_CYCLE1(rfbi_module), cycle1); + rfbi_write_reg(RFBI_DATA_CYCLE2(rfbi_module), cycle2); + rfbi_write_reg(RFBI_DATA_CYCLE3(rfbi_module), cycle3); + + + l = rfbi_read_reg(RFBI_CONTROL); + l = FLD_MOD(l, rfbi_module+1, 3, 2); /* Select CSx */ + l = FLD_MOD(l, 0, 1, 1); /* clear bypass */ + rfbi_write_reg(RFBI_CONTROL, l); + + + DSSDBG("RFBI config: bpp %d, lines %d, cycles: 0x%x 0x%x 0x%x\n", + bpp, lines, cycle1, cycle2, cycle3); + + return 0; +} + +static int rfbi_configure(struct omap_dss_device *dssdev) +{ + return rfbi_configure_bus(dssdev->phy.rfbi.channel, rfbi.pixel_size, + rfbi.data_lines); +} + +static int rfbi_update(struct omap_dss_device *dssdev, void (*callback)(void *), + void *data) +{ + return rfbi_transfer_area(dssdev, callback, data); +} + +static void rfbi_set_size(struct omap_dss_device *dssdev, u16 w, u16 h) +{ + rfbi.timings.x_res = w; + rfbi.timings.y_res = h; +} + +static void rfbi_set_pixel_size(struct omap_dss_device *dssdev, int pixel_size) +{ + rfbi.pixel_size = pixel_size; +} + +static void rfbi_set_data_lines(struct omap_dss_device *dssdev, int data_lines) +{ + rfbi.data_lines = data_lines; +} + +static void rfbi_set_interface_timings(struct omap_dss_device *dssdev, + struct rfbi_timings *timings) +{ + rfbi.intf_timings = *timings; +} + +static void rfbi_dump_regs(struct seq_file *s) +{ +#define DUMPREG(r) seq_printf(s, "%-35s %08x\n", #r, rfbi_read_reg(r)) + + if (rfbi_runtime_get()) + return; + + DUMPREG(RFBI_REVISION); + DUMPREG(RFBI_SYSCONFIG); + DUMPREG(RFBI_SYSSTATUS); + DUMPREG(RFBI_CONTROL); + DUMPREG(RFBI_PIXEL_CNT); + DUMPREG(RFBI_LINE_NUMBER); + DUMPREG(RFBI_CMD); + DUMPREG(RFBI_PARAM); + DUMPREG(RFBI_DATA); + DUMPREG(RFBI_READ); + DUMPREG(RFBI_STATUS); + + DUMPREG(RFBI_CONFIG(0)); + DUMPREG(RFBI_ONOFF_TIME(0)); + DUMPREG(RFBI_CYCLE_TIME(0)); + DUMPREG(RFBI_DATA_CYCLE1(0)); + DUMPREG(RFBI_DATA_CYCLE2(0)); + DUMPREG(RFBI_DATA_CYCLE3(0)); + + DUMPREG(RFBI_CONFIG(1)); + DUMPREG(RFBI_ONOFF_TIME(1)); + DUMPREG(RFBI_CYCLE_TIME(1)); + DUMPREG(RFBI_DATA_CYCLE1(1)); + DUMPREG(RFBI_DATA_CYCLE2(1)); + DUMPREG(RFBI_DATA_CYCLE3(1)); + + DUMPREG(RFBI_VSYNC_WIDTH); + DUMPREG(RFBI_HSYNC_WIDTH); + + rfbi_runtime_put(); +#undef DUMPREG +} + +static void rfbi_config_lcd_manager(struct omap_dss_device *dssdev) +{ + struct omap_overlay_manager *mgr = rfbi.output.manager; + struct dss_lcd_mgr_config mgr_config; + + mgr_config.io_pad_mode = DSS_IO_PAD_MODE_RFBI; + + mgr_config.stallmode = true; + /* Do we need fifohandcheck for RFBI? */ + mgr_config.fifohandcheck = false; + + mgr_config.video_port_width = rfbi.pixel_size; + mgr_config.lcden_sig_polarity = 0; + + dss_mgr_set_lcd_config(mgr, &mgr_config); + + /* + * Set rfbi.timings with default values, the x_res and y_res fields + * are expected to be already configured by the panel driver via + * omapdss_rfbi_set_size() + */ + rfbi.timings.hsw = 1; + rfbi.timings.hfp = 1; + rfbi.timings.hbp = 1; + rfbi.timings.vsw = 1; + rfbi.timings.vfp = 0; + rfbi.timings.vbp = 0; + + rfbi.timings.interlace = false; + rfbi.timings.hsync_level = OMAPDSS_SIG_ACTIVE_HIGH; + rfbi.timings.vsync_level = OMAPDSS_SIG_ACTIVE_HIGH; + rfbi.timings.data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE; + rfbi.timings.de_level = OMAPDSS_SIG_ACTIVE_HIGH; + rfbi.timings.sync_pclk_edge = OMAPDSS_DRIVE_SIG_FALLING_EDGE; + + dss_mgr_set_timings(mgr, &rfbi.timings); +} + +static int rfbi_display_enable(struct omap_dss_device *dssdev) +{ + struct omap_dss_device *out = &rfbi.output; + int r; + + if (out == NULL || out->manager == NULL) { + DSSERR("failed to enable display: no output/manager\n"); + return -ENODEV; + } + + r = rfbi_runtime_get(); + if (r) + return r; + + r = dss_mgr_register_framedone_handler(out->manager, + framedone_callback, NULL); + if (r) { + DSSERR("can't get FRAMEDONE irq\n"); + goto err1; + } + + rfbi_config_lcd_manager(dssdev); + + rfbi_configure_bus(dssdev->phy.rfbi.channel, rfbi.pixel_size, + rfbi.data_lines); + + rfbi_set_timings(dssdev->phy.rfbi.channel, &rfbi.intf_timings); + + return 0; +err1: + rfbi_runtime_put(); + return r; +} + +static void rfbi_display_disable(struct omap_dss_device *dssdev) +{ + struct omap_dss_device *out = &rfbi.output; + + dss_mgr_unregister_framedone_handler(out->manager, + framedone_callback, NULL); + + rfbi_runtime_put(); +} + +static int rfbi_init_display(struct omap_dss_device *dssdev) +{ + rfbi.dssdev[dssdev->phy.rfbi.channel] = dssdev; + return 0; +} + +static void rfbi_init_output(struct platform_device *pdev) +{ + struct omap_dss_device *out = &rfbi.output; + + out->dev = &pdev->dev; + out->id = OMAP_DSS_OUTPUT_DBI; + out->output_type = OMAP_DISPLAY_TYPE_DBI; + out->name = "rfbi.0"; + out->dispc_channel = OMAP_DSS_CHANNEL_LCD; + out->owner = THIS_MODULE; + + omapdss_register_output(out); +} + +static void __exit rfbi_uninit_output(struct platform_device *pdev) +{ + struct omap_dss_device *out = &rfbi.output; + + omapdss_unregister_output(out); +} + +/* RFBI HW IP initialisation */ +static int omap_rfbihw_probe(struct platform_device *pdev) +{ + u32 rev; + struct resource *rfbi_mem; + struct clk *clk; + int r; + + rfbi.pdev = pdev; + + sema_init(&rfbi.bus_lock, 1); + + rfbi_mem = platform_get_resource(rfbi.pdev, IORESOURCE_MEM, 0); + if (!rfbi_mem) { + DSSERR("can't get IORESOURCE_MEM RFBI\n"); + return -EINVAL; + } + + rfbi.base = devm_ioremap(&pdev->dev, rfbi_mem->start, + resource_size(rfbi_mem)); + if (!rfbi.base) { + DSSERR("can't ioremap RFBI\n"); + return -ENOMEM; + } + + clk = clk_get(&pdev->dev, "ick"); + if (IS_ERR(clk)) { + DSSERR("can't get ick\n"); + return PTR_ERR(clk); + } + + rfbi.l4_khz = clk_get_rate(clk) / 1000; + + clk_put(clk); + + pm_runtime_enable(&pdev->dev); + + r = rfbi_runtime_get(); + if (r) + goto err_runtime_get; + + msleep(10); + + rev = rfbi_read_reg(RFBI_REVISION); + dev_dbg(&pdev->dev, "OMAP RFBI rev %d.%d\n", + FLD_GET(rev, 7, 4), FLD_GET(rev, 3, 0)); + + rfbi_runtime_put(); + + dss_debugfs_create_file("rfbi", rfbi_dump_regs); + + rfbi_init_output(pdev); + + return 0; + +err_runtime_get: + pm_runtime_disable(&pdev->dev); + return r; +} + +static int __exit omap_rfbihw_remove(struct platform_device *pdev) +{ + rfbi_uninit_output(pdev); + + pm_runtime_disable(&pdev->dev); + + return 0; +} + +static int rfbi_runtime_suspend(struct device *dev) +{ + dispc_runtime_put(); + + return 0; +} + +static int rfbi_runtime_resume(struct device *dev) +{ + int r; + + r = dispc_runtime_get(); + if (r < 0) + return r; + + return 0; +} + +static const struct dev_pm_ops rfbi_pm_ops = { + .runtime_suspend = rfbi_runtime_suspend, + .runtime_resume = rfbi_runtime_resume, +}; + +static struct platform_driver omap_rfbihw_driver = { + .probe = omap_rfbihw_probe, + .remove = __exit_p(omap_rfbihw_remove), + .driver = { + .name = "omapdss_rfbi", + .pm = &rfbi_pm_ops, + .suppress_bind_attrs = true, + }, +}; + +int __init rfbi_init_platform_driver(void) +{ + return platform_driver_register(&omap_rfbihw_driver); +} + +void __exit rfbi_uninit_platform_driver(void) +{ + platform_driver_unregister(&omap_rfbihw_driver); +} |