Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 1 | /* |
| 2 | * linux/drivers/video/omap2/dss/dss.c |
| 3 | * |
| 4 | * Copyright (C) 2009 Nokia Corporation |
| 5 | * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com> |
| 6 | * |
| 7 | * Some code and ideas taken from drivers/video/omap/ driver |
| 8 | * by Imre Deak. |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify it |
| 11 | * under the terms of the GNU General Public License version 2 as published by |
| 12 | * the Free Software Foundation. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, but WITHOUT |
| 15 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 16 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 17 | * more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License along with |
| 20 | * this program. If not, see <http://www.gnu.org/licenses/>. |
| 21 | */ |
| 22 | |
| 23 | #define DSS_SUBSYS_NAME "DSS" |
| 24 | |
| 25 | #include <linux/kernel.h> |
| 26 | #include <linux/io.h> |
| 27 | #include <linux/err.h> |
| 28 | #include <linux/delay.h> |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 29 | #include <linux/seq_file.h> |
| 30 | #include <linux/clk.h> |
| 31 | |
Tomi Valkeinen | a0b38cc | 2011-05-11 14:05:07 +0300 | [diff] [blame] | 32 | #include <video/omapdss.h> |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 33 | #include <plat/clock.h> |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 34 | #include "dss.h" |
Tomi Valkeinen | 6ec549e | 2011-02-24 14:18:50 +0200 | [diff] [blame] | 35 | #include "dss_features.h" |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 36 | |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 37 | #define DSS_SZ_REGS SZ_512 |
| 38 | |
| 39 | struct dss_reg { |
| 40 | u16 idx; |
| 41 | }; |
| 42 | |
| 43 | #define DSS_REG(idx) ((const struct dss_reg) { idx }) |
| 44 | |
| 45 | #define DSS_REVISION DSS_REG(0x0000) |
| 46 | #define DSS_SYSCONFIG DSS_REG(0x0010) |
| 47 | #define DSS_SYSSTATUS DSS_REG(0x0014) |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 48 | #define DSS_CONTROL DSS_REG(0x0040) |
| 49 | #define DSS_SDI_CONTROL DSS_REG(0x0044) |
| 50 | #define DSS_PLL_CONTROL DSS_REG(0x0048) |
| 51 | #define DSS_SDI_STATUS DSS_REG(0x005C) |
| 52 | |
| 53 | #define REG_GET(idx, start, end) \ |
| 54 | FLD_GET(dss_read_reg(idx), start, end) |
| 55 | |
| 56 | #define REG_FLD_MOD(idx, val, start, end) \ |
| 57 | dss_write_reg(idx, FLD_MOD(dss_read_reg(idx), val, start, end)) |
| 58 | |
| 59 | static struct { |
Senthilvadivu Guruswamy | 96c401b | 2011-01-24 06:21:57 +0000 | [diff] [blame] | 60 | struct platform_device *pdev; |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 61 | void __iomem *base; |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 62 | int ctx_id; |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 63 | |
| 64 | struct clk *dpll4_m4_ck; |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 65 | struct clk *dss_ick; |
Archit Taneja | c7642f6 | 2011-01-31 16:27:45 +0000 | [diff] [blame] | 66 | struct clk *dss_fck; |
| 67 | struct clk *dss_sys_clk; |
| 68 | struct clk *dss_tv_fck; |
| 69 | struct clk *dss_video_fck; |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 70 | unsigned num_clks_enabled; |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 71 | |
| 72 | unsigned long cache_req_pck; |
| 73 | unsigned long cache_prate; |
| 74 | struct dss_clock_info cache_dss_cinfo; |
| 75 | struct dispc_clock_info cache_dispc_cinfo; |
| 76 | |
Archit Taneja | 89a35e5 | 2011-04-12 13:52:23 +0530 | [diff] [blame] | 77 | enum omap_dss_clk_source dsi_clk_source; |
| 78 | enum omap_dss_clk_source dispc_clk_source; |
| 79 | enum omap_dss_clk_source lcd_clk_source[MAX_DSS_LCD_MANAGERS]; |
Tomi Valkeinen | 2f18c4d | 2010-01-08 18:00:36 +0200 | [diff] [blame] | 80 | |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 81 | u32 ctx[DSS_SZ_REGS / sizeof(u32)]; |
| 82 | } dss; |
| 83 | |
Taneja, Archit | 235e7db | 2011-03-14 23:28:21 -0500 | [diff] [blame] | 84 | static const char * const dss_generic_clk_source_names[] = { |
Archit Taneja | 89a35e5 | 2011-04-12 13:52:23 +0530 | [diff] [blame] | 85 | [OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC] = "DSI_PLL_HSDIV_DISPC", |
| 86 | [OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DSI] = "DSI_PLL_HSDIV_DSI", |
| 87 | [OMAP_DSS_CLK_SRC_FCK] = "DSS_FCK", |
Archit Taneja | 067a57e | 2011-03-02 11:57:25 +0530 | [diff] [blame] | 88 | }; |
| 89 | |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 90 | static void dss_clk_enable_all_no_ctx(void); |
| 91 | static void dss_clk_disable_all_no_ctx(void); |
| 92 | static void dss_clk_enable_no_ctx(enum dss_clock clks); |
| 93 | static void dss_clk_disable_no_ctx(enum dss_clock clks); |
| 94 | |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 95 | static int _omap_dss_wait_reset(void); |
| 96 | |
| 97 | static inline void dss_write_reg(const struct dss_reg idx, u32 val) |
| 98 | { |
| 99 | __raw_writel(val, dss.base + idx.idx); |
| 100 | } |
| 101 | |
| 102 | static inline u32 dss_read_reg(const struct dss_reg idx) |
| 103 | { |
| 104 | return __raw_readl(dss.base + idx.idx); |
| 105 | } |
| 106 | |
| 107 | #define SR(reg) \ |
| 108 | dss.ctx[(DSS_##reg).idx / sizeof(u32)] = dss_read_reg(DSS_##reg) |
| 109 | #define RR(reg) \ |
| 110 | dss_write_reg(DSS_##reg, dss.ctx[(DSS_##reg).idx / sizeof(u32)]) |
| 111 | |
| 112 | void dss_save_context(void) |
| 113 | { |
| 114 | if (cpu_is_omap24xx()) |
| 115 | return; |
| 116 | |
| 117 | SR(SYSCONFIG); |
| 118 | SR(CONTROL); |
| 119 | |
Tomi Valkeinen | 6ec549e | 2011-02-24 14:18:50 +0200 | [diff] [blame] | 120 | if (dss_feat_get_supported_displays(OMAP_DSS_CHANNEL_LCD) & |
| 121 | OMAP_DISPLAY_TYPE_SDI) { |
| 122 | SR(SDI_CONTROL); |
| 123 | SR(PLL_CONTROL); |
| 124 | } |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 125 | } |
| 126 | |
| 127 | void dss_restore_context(void) |
| 128 | { |
| 129 | if (_omap_dss_wait_reset()) |
| 130 | DSSERR("DSS not coming out of reset after sleep\n"); |
| 131 | |
| 132 | RR(SYSCONFIG); |
| 133 | RR(CONTROL); |
| 134 | |
Tomi Valkeinen | 6ec549e | 2011-02-24 14:18:50 +0200 | [diff] [blame] | 135 | if (dss_feat_get_supported_displays(OMAP_DSS_CHANNEL_LCD) & |
| 136 | OMAP_DISPLAY_TYPE_SDI) { |
| 137 | RR(SDI_CONTROL); |
| 138 | RR(PLL_CONTROL); |
| 139 | } |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 140 | } |
| 141 | |
| 142 | #undef SR |
| 143 | #undef RR |
| 144 | |
| 145 | void dss_sdi_init(u8 datapairs) |
| 146 | { |
| 147 | u32 l; |
| 148 | |
| 149 | BUG_ON(datapairs > 3 || datapairs < 1); |
| 150 | |
| 151 | l = dss_read_reg(DSS_SDI_CONTROL); |
| 152 | l = FLD_MOD(l, 0xf, 19, 15); /* SDI_PDIV */ |
| 153 | l = FLD_MOD(l, datapairs-1, 3, 2); /* SDI_PRSEL */ |
| 154 | l = FLD_MOD(l, 2, 1, 0); /* SDI_BWSEL */ |
| 155 | dss_write_reg(DSS_SDI_CONTROL, l); |
| 156 | |
| 157 | l = dss_read_reg(DSS_PLL_CONTROL); |
| 158 | l = FLD_MOD(l, 0x7, 25, 22); /* SDI_PLL_FREQSEL */ |
| 159 | l = FLD_MOD(l, 0xb, 16, 11); /* SDI_PLL_REGN */ |
| 160 | l = FLD_MOD(l, 0xb4, 10, 1); /* SDI_PLL_REGM */ |
| 161 | dss_write_reg(DSS_PLL_CONTROL, l); |
| 162 | } |
| 163 | |
| 164 | int dss_sdi_enable(void) |
| 165 | { |
| 166 | unsigned long timeout; |
| 167 | |
| 168 | dispc_pck_free_enable(1); |
| 169 | |
| 170 | /* Reset SDI PLL */ |
| 171 | REG_FLD_MOD(DSS_PLL_CONTROL, 1, 18, 18); /* SDI_PLL_SYSRESET */ |
| 172 | udelay(1); /* wait 2x PCLK */ |
| 173 | |
| 174 | /* Lock SDI PLL */ |
| 175 | REG_FLD_MOD(DSS_PLL_CONTROL, 1, 28, 28); /* SDI_PLL_GOBIT */ |
| 176 | |
| 177 | /* Waiting for PLL lock request to complete */ |
| 178 | timeout = jiffies + msecs_to_jiffies(500); |
| 179 | while (dss_read_reg(DSS_SDI_STATUS) & (1 << 6)) { |
| 180 | if (time_after_eq(jiffies, timeout)) { |
| 181 | DSSERR("PLL lock request timed out\n"); |
| 182 | goto err1; |
| 183 | } |
| 184 | } |
| 185 | |
| 186 | /* Clearing PLL_GO bit */ |
| 187 | REG_FLD_MOD(DSS_PLL_CONTROL, 0, 28, 28); |
| 188 | |
| 189 | /* Waiting for PLL to lock */ |
| 190 | timeout = jiffies + msecs_to_jiffies(500); |
| 191 | while (!(dss_read_reg(DSS_SDI_STATUS) & (1 << 5))) { |
| 192 | if (time_after_eq(jiffies, timeout)) { |
| 193 | DSSERR("PLL lock timed out\n"); |
| 194 | goto err1; |
| 195 | } |
| 196 | } |
| 197 | |
| 198 | dispc_lcd_enable_signal(1); |
| 199 | |
| 200 | /* Waiting for SDI reset to complete */ |
| 201 | timeout = jiffies + msecs_to_jiffies(500); |
| 202 | while (!(dss_read_reg(DSS_SDI_STATUS) & (1 << 2))) { |
| 203 | if (time_after_eq(jiffies, timeout)) { |
| 204 | DSSERR("SDI reset timed out\n"); |
| 205 | goto err2; |
| 206 | } |
| 207 | } |
| 208 | |
| 209 | return 0; |
| 210 | |
| 211 | err2: |
| 212 | dispc_lcd_enable_signal(0); |
| 213 | err1: |
| 214 | /* Reset SDI PLL */ |
| 215 | REG_FLD_MOD(DSS_PLL_CONTROL, 0, 18, 18); /* SDI_PLL_SYSRESET */ |
| 216 | |
| 217 | dispc_pck_free_enable(0); |
| 218 | |
| 219 | return -ETIMEDOUT; |
| 220 | } |
| 221 | |
| 222 | void dss_sdi_disable(void) |
| 223 | { |
| 224 | dispc_lcd_enable_signal(0); |
| 225 | |
| 226 | dispc_pck_free_enable(0); |
| 227 | |
| 228 | /* Reset SDI PLL */ |
| 229 | REG_FLD_MOD(DSS_PLL_CONTROL, 0, 18, 18); /* SDI_PLL_SYSRESET */ |
| 230 | } |
| 231 | |
Archit Taneja | 89a35e5 | 2011-04-12 13:52:23 +0530 | [diff] [blame] | 232 | const char *dss_get_generic_clk_source_name(enum omap_dss_clk_source clk_src) |
Archit Taneja | 067a57e | 2011-03-02 11:57:25 +0530 | [diff] [blame] | 233 | { |
Taneja, Archit | 235e7db | 2011-03-14 23:28:21 -0500 | [diff] [blame] | 234 | return dss_generic_clk_source_names[clk_src]; |
Archit Taneja | 067a57e | 2011-03-02 11:57:25 +0530 | [diff] [blame] | 235 | } |
| 236 | |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 237 | void dss_dump_clocks(struct seq_file *s) |
| 238 | { |
| 239 | unsigned long dpll4_ck_rate; |
| 240 | unsigned long dpll4_m4_ck_rate; |
Tomi Valkeinen | 0acf659 | 2011-03-14 07:28:57 -0500 | [diff] [blame] | 241 | const char *fclk_name, *fclk_real_name; |
| 242 | unsigned long fclk_rate; |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 243 | |
Archit Taneja | 6af9cd1 | 2011-01-31 16:27:44 +0000 | [diff] [blame] | 244 | dss_clk_enable(DSS_CLK_ICK | DSS_CLK_FCK); |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 245 | |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 246 | seq_printf(s, "- DSS -\n"); |
| 247 | |
Archit Taneja | 89a35e5 | 2011-04-12 13:52:23 +0530 | [diff] [blame] | 248 | fclk_name = dss_get_generic_clk_source_name(OMAP_DSS_CLK_SRC_FCK); |
| 249 | fclk_real_name = dss_feat_get_clk_source_name(OMAP_DSS_CLK_SRC_FCK); |
Tomi Valkeinen | 0acf659 | 2011-03-14 07:28:57 -0500 | [diff] [blame] | 250 | fclk_rate = dss_clk_get_rate(DSS_CLK_FCK); |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 251 | |
Tomi Valkeinen | 0acf659 | 2011-03-14 07:28:57 -0500 | [diff] [blame] | 252 | if (dss.dpll4_m4_ck) { |
| 253 | dpll4_ck_rate = clk_get_rate(clk_get_parent(dss.dpll4_m4_ck)); |
| 254 | dpll4_m4_ck_rate = clk_get_rate(dss.dpll4_m4_ck); |
| 255 | |
| 256 | seq_printf(s, "dpll4_ck %lu\n", dpll4_ck_rate); |
| 257 | |
Murthy, Raghuveer | 2de1108 | 2011-03-14 07:28:58 -0500 | [diff] [blame] | 258 | if (cpu_is_omap3630() || cpu_is_omap44xx()) |
Tomi Valkeinen | 0acf659 | 2011-03-14 07:28:57 -0500 | [diff] [blame] | 259 | seq_printf(s, "%s (%s) = %lu / %lu = %lu\n", |
| 260 | fclk_name, fclk_real_name, |
| 261 | dpll4_ck_rate, |
| 262 | dpll4_ck_rate / dpll4_m4_ck_rate, |
| 263 | fclk_rate); |
| 264 | else |
| 265 | seq_printf(s, "%s (%s) = %lu / %lu * 2 = %lu\n", |
| 266 | fclk_name, fclk_real_name, |
| 267 | dpll4_ck_rate, |
| 268 | dpll4_ck_rate / dpll4_m4_ck_rate, |
| 269 | fclk_rate); |
| 270 | } else { |
| 271 | seq_printf(s, "%s (%s) = %lu\n", |
| 272 | fclk_name, fclk_real_name, |
| 273 | fclk_rate); |
| 274 | } |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 275 | |
Archit Taneja | 6af9cd1 | 2011-01-31 16:27:44 +0000 | [diff] [blame] | 276 | dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK); |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 277 | } |
| 278 | |
| 279 | void dss_dump_regs(struct seq_file *s) |
| 280 | { |
| 281 | #define DUMPREG(r) seq_printf(s, "%-35s %08x\n", #r, dss_read_reg(r)) |
| 282 | |
Archit Taneja | 6af9cd1 | 2011-01-31 16:27:44 +0000 | [diff] [blame] | 283 | dss_clk_enable(DSS_CLK_ICK | DSS_CLK_FCK); |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 284 | |
| 285 | DUMPREG(DSS_REVISION); |
| 286 | DUMPREG(DSS_SYSCONFIG); |
| 287 | DUMPREG(DSS_SYSSTATUS); |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 288 | DUMPREG(DSS_CONTROL); |
Tomi Valkeinen | 6ec549e | 2011-02-24 14:18:50 +0200 | [diff] [blame] | 289 | |
| 290 | if (dss_feat_get_supported_displays(OMAP_DSS_CHANNEL_LCD) & |
| 291 | OMAP_DISPLAY_TYPE_SDI) { |
| 292 | DUMPREG(DSS_SDI_CONTROL); |
| 293 | DUMPREG(DSS_PLL_CONTROL); |
| 294 | DUMPREG(DSS_SDI_STATUS); |
| 295 | } |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 296 | |
Archit Taneja | 6af9cd1 | 2011-01-31 16:27:44 +0000 | [diff] [blame] | 297 | dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK); |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 298 | #undef DUMPREG |
| 299 | } |
| 300 | |
Archit Taneja | 89a35e5 | 2011-04-12 13:52:23 +0530 | [diff] [blame] | 301 | void dss_select_dispc_clk_source(enum omap_dss_clk_source clk_src) |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 302 | { |
Archit Taneja | a72b64b | 2011-05-12 17:26:26 +0530 | [diff] [blame^] | 303 | struct platform_device *dsidev; |
Tomi Valkeinen | 2f18c4d | 2010-01-08 18:00:36 +0200 | [diff] [blame] | 304 | int b; |
Taneja, Archit | ea75159 | 2011-03-08 05:50:35 -0600 | [diff] [blame] | 305 | u8 start, end; |
Tomi Valkeinen | 2f18c4d | 2010-01-08 18:00:36 +0200 | [diff] [blame] | 306 | |
Taneja, Archit | 66534e8 | 2011-03-08 05:50:34 -0600 | [diff] [blame] | 307 | switch (clk_src) { |
Archit Taneja | 89a35e5 | 2011-04-12 13:52:23 +0530 | [diff] [blame] | 308 | case OMAP_DSS_CLK_SRC_FCK: |
Taneja, Archit | 66534e8 | 2011-03-08 05:50:34 -0600 | [diff] [blame] | 309 | b = 0; |
| 310 | break; |
Archit Taneja | 89a35e5 | 2011-04-12 13:52:23 +0530 | [diff] [blame] | 311 | case OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC: |
Taneja, Archit | 66534e8 | 2011-03-08 05:50:34 -0600 | [diff] [blame] | 312 | b = 1; |
Archit Taneja | a72b64b | 2011-05-12 17:26:26 +0530 | [diff] [blame^] | 313 | dsidev = dsi_get_dsidev_from_id(0); |
| 314 | dsi_wait_pll_hsdiv_dispc_active(dsidev); |
Taneja, Archit | 66534e8 | 2011-03-08 05:50:34 -0600 | [diff] [blame] | 315 | break; |
| 316 | default: |
| 317 | BUG(); |
| 318 | } |
Tomi Valkeinen | e406f90 | 2010-06-09 15:28:12 +0300 | [diff] [blame] | 319 | |
Taneja, Archit | ea75159 | 2011-03-08 05:50:35 -0600 | [diff] [blame] | 320 | dss_feat_get_reg_field(FEAT_REG_DISPC_CLK_SWITCH, &start, &end); |
| 321 | |
| 322 | REG_FLD_MOD(DSS_CONTROL, b, start, end); /* DISPC_CLK_SWITCH */ |
Tomi Valkeinen | 2f18c4d | 2010-01-08 18:00:36 +0200 | [diff] [blame] | 323 | |
| 324 | dss.dispc_clk_source = clk_src; |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 325 | } |
| 326 | |
Archit Taneja | 89a35e5 | 2011-04-12 13:52:23 +0530 | [diff] [blame] | 327 | void dss_select_dsi_clk_source(enum omap_dss_clk_source clk_src) |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 328 | { |
Archit Taneja | a72b64b | 2011-05-12 17:26:26 +0530 | [diff] [blame^] | 329 | struct platform_device *dsidev; |
Tomi Valkeinen | 2f18c4d | 2010-01-08 18:00:36 +0200 | [diff] [blame] | 330 | int b; |
| 331 | |
Taneja, Archit | 66534e8 | 2011-03-08 05:50:34 -0600 | [diff] [blame] | 332 | switch (clk_src) { |
Archit Taneja | 89a35e5 | 2011-04-12 13:52:23 +0530 | [diff] [blame] | 333 | case OMAP_DSS_CLK_SRC_FCK: |
Taneja, Archit | 66534e8 | 2011-03-08 05:50:34 -0600 | [diff] [blame] | 334 | b = 0; |
| 335 | break; |
Archit Taneja | 89a35e5 | 2011-04-12 13:52:23 +0530 | [diff] [blame] | 336 | case OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DSI: |
Taneja, Archit | 66534e8 | 2011-03-08 05:50:34 -0600 | [diff] [blame] | 337 | b = 1; |
Archit Taneja | a72b64b | 2011-05-12 17:26:26 +0530 | [diff] [blame^] | 338 | dsidev = dsi_get_dsidev_from_id(0); |
| 339 | dsi_wait_pll_hsdiv_dsi_active(dsidev); |
Taneja, Archit | 66534e8 | 2011-03-08 05:50:34 -0600 | [diff] [blame] | 340 | break; |
| 341 | default: |
| 342 | BUG(); |
| 343 | } |
Tomi Valkeinen | e406f90 | 2010-06-09 15:28:12 +0300 | [diff] [blame] | 344 | |
Tomi Valkeinen | 2f18c4d | 2010-01-08 18:00:36 +0200 | [diff] [blame] | 345 | REG_FLD_MOD(DSS_CONTROL, b, 1, 1); /* DSI_CLK_SWITCH */ |
| 346 | |
| 347 | dss.dsi_clk_source = clk_src; |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 348 | } |
| 349 | |
Taneja, Archit | ea75159 | 2011-03-08 05:50:35 -0600 | [diff] [blame] | 350 | void dss_select_lcd_clk_source(enum omap_channel channel, |
Archit Taneja | 89a35e5 | 2011-04-12 13:52:23 +0530 | [diff] [blame] | 351 | enum omap_dss_clk_source clk_src) |
Taneja, Archit | ea75159 | 2011-03-08 05:50:35 -0600 | [diff] [blame] | 352 | { |
Archit Taneja | a72b64b | 2011-05-12 17:26:26 +0530 | [diff] [blame^] | 353 | struct platform_device *dsidev; |
Taneja, Archit | ea75159 | 2011-03-08 05:50:35 -0600 | [diff] [blame] | 354 | int b, ix, pos; |
| 355 | |
| 356 | if (!dss_has_feature(FEAT_LCD_CLK_SRC)) |
| 357 | return; |
| 358 | |
| 359 | switch (clk_src) { |
Archit Taneja | 89a35e5 | 2011-04-12 13:52:23 +0530 | [diff] [blame] | 360 | case OMAP_DSS_CLK_SRC_FCK: |
Taneja, Archit | ea75159 | 2011-03-08 05:50:35 -0600 | [diff] [blame] | 361 | b = 0; |
| 362 | break; |
Archit Taneja | 89a35e5 | 2011-04-12 13:52:23 +0530 | [diff] [blame] | 363 | case OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC: |
Taneja, Archit | ea75159 | 2011-03-08 05:50:35 -0600 | [diff] [blame] | 364 | BUG_ON(channel != OMAP_DSS_CHANNEL_LCD); |
| 365 | b = 1; |
Archit Taneja | a72b64b | 2011-05-12 17:26:26 +0530 | [diff] [blame^] | 366 | dsidev = dsi_get_dsidev_from_id(0); |
| 367 | dsi_wait_pll_hsdiv_dispc_active(dsidev); |
Taneja, Archit | ea75159 | 2011-03-08 05:50:35 -0600 | [diff] [blame] | 368 | break; |
| 369 | default: |
| 370 | BUG(); |
| 371 | } |
| 372 | |
| 373 | pos = channel == OMAP_DSS_CHANNEL_LCD ? 0 : 12; |
| 374 | REG_FLD_MOD(DSS_CONTROL, b, pos, pos); /* LCDx_CLK_SWITCH */ |
| 375 | |
| 376 | ix = channel == OMAP_DSS_CHANNEL_LCD ? 0 : 1; |
| 377 | dss.lcd_clk_source[ix] = clk_src; |
| 378 | } |
| 379 | |
Archit Taneja | 89a35e5 | 2011-04-12 13:52:23 +0530 | [diff] [blame] | 380 | enum omap_dss_clk_source dss_get_dispc_clk_source(void) |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 381 | { |
Tomi Valkeinen | 2f18c4d | 2010-01-08 18:00:36 +0200 | [diff] [blame] | 382 | return dss.dispc_clk_source; |
| 383 | } |
| 384 | |
Archit Taneja | 89a35e5 | 2011-04-12 13:52:23 +0530 | [diff] [blame] | 385 | enum omap_dss_clk_source dss_get_dsi_clk_source(void) |
Tomi Valkeinen | 2f18c4d | 2010-01-08 18:00:36 +0200 | [diff] [blame] | 386 | { |
| 387 | return dss.dsi_clk_source; |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 388 | } |
| 389 | |
Archit Taneja | 89a35e5 | 2011-04-12 13:52:23 +0530 | [diff] [blame] | 390 | enum omap_dss_clk_source dss_get_lcd_clk_source(enum omap_channel channel) |
Taneja, Archit | ea75159 | 2011-03-08 05:50:35 -0600 | [diff] [blame] | 391 | { |
Archit Taneja | 89976f2 | 2011-03-31 13:23:35 +0530 | [diff] [blame] | 392 | if (dss_has_feature(FEAT_LCD_CLK_SRC)) { |
| 393 | int ix = channel == OMAP_DSS_CHANNEL_LCD ? 0 : 1; |
| 394 | return dss.lcd_clk_source[ix]; |
| 395 | } else { |
| 396 | /* LCD_CLK source is the same as DISPC_FCLK source for |
| 397 | * OMAP2 and OMAP3 */ |
| 398 | return dss.dispc_clk_source; |
| 399 | } |
Taneja, Archit | ea75159 | 2011-03-08 05:50:35 -0600 | [diff] [blame] | 400 | } |
| 401 | |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 402 | /* calculate clock rates using dividers in cinfo */ |
| 403 | int dss_calc_clock_rates(struct dss_clock_info *cinfo) |
| 404 | { |
Tomi Valkeinen | 0acf659 | 2011-03-14 07:28:57 -0500 | [diff] [blame] | 405 | if (dss.dpll4_m4_ck) { |
| 406 | unsigned long prate; |
Murthy, Raghuveer | 2de1108 | 2011-03-14 07:28:58 -0500 | [diff] [blame] | 407 | u16 fck_div_max = 16; |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 408 | |
Murthy, Raghuveer | 2de1108 | 2011-03-14 07:28:58 -0500 | [diff] [blame] | 409 | if (cpu_is_omap3630() || cpu_is_omap44xx()) |
| 410 | fck_div_max = 32; |
| 411 | |
| 412 | if (cinfo->fck_div > fck_div_max || cinfo->fck_div == 0) |
Tomi Valkeinen | 0acf659 | 2011-03-14 07:28:57 -0500 | [diff] [blame] | 413 | return -EINVAL; |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 414 | |
Tomi Valkeinen | 0acf659 | 2011-03-14 07:28:57 -0500 | [diff] [blame] | 415 | prate = clk_get_rate(clk_get_parent(dss.dpll4_m4_ck)); |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 416 | |
Tomi Valkeinen | 0acf659 | 2011-03-14 07:28:57 -0500 | [diff] [blame] | 417 | cinfo->fck = prate / cinfo->fck_div; |
| 418 | } else { |
| 419 | if (cinfo->fck_div != 0) |
| 420 | return -EINVAL; |
| 421 | cinfo->fck = dss_clk_get_rate(DSS_CLK_FCK); |
| 422 | } |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 423 | |
| 424 | return 0; |
| 425 | } |
| 426 | |
| 427 | int dss_set_clock_div(struct dss_clock_info *cinfo) |
| 428 | { |
Tomi Valkeinen | 0acf659 | 2011-03-14 07:28:57 -0500 | [diff] [blame] | 429 | if (dss.dpll4_m4_ck) { |
| 430 | unsigned long prate; |
| 431 | int r; |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 432 | |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 433 | prate = clk_get_rate(clk_get_parent(dss.dpll4_m4_ck)); |
| 434 | DSSDBG("dpll4_m4 = %ld\n", prate); |
| 435 | |
| 436 | r = clk_set_rate(dss.dpll4_m4_ck, prate / cinfo->fck_div); |
| 437 | if (r) |
| 438 | return r; |
Tomi Valkeinen | 0acf659 | 2011-03-14 07:28:57 -0500 | [diff] [blame] | 439 | } else { |
| 440 | if (cinfo->fck_div != 0) |
| 441 | return -EINVAL; |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 442 | } |
| 443 | |
| 444 | DSSDBG("fck = %ld (%d)\n", cinfo->fck, cinfo->fck_div); |
| 445 | |
| 446 | return 0; |
| 447 | } |
| 448 | |
| 449 | int dss_get_clock_div(struct dss_clock_info *cinfo) |
| 450 | { |
Archit Taneja | 6af9cd1 | 2011-01-31 16:27:44 +0000 | [diff] [blame] | 451 | cinfo->fck = dss_clk_get_rate(DSS_CLK_FCK); |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 452 | |
Tomi Valkeinen | 0acf659 | 2011-03-14 07:28:57 -0500 | [diff] [blame] | 453 | if (dss.dpll4_m4_ck) { |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 454 | unsigned long prate; |
Tomi Valkeinen | 0acf659 | 2011-03-14 07:28:57 -0500 | [diff] [blame] | 455 | |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 456 | prate = clk_get_rate(clk_get_parent(dss.dpll4_m4_ck)); |
Tomi Valkeinen | 0acf659 | 2011-03-14 07:28:57 -0500 | [diff] [blame] | 457 | |
Murthy, Raghuveer | 2de1108 | 2011-03-14 07:28:58 -0500 | [diff] [blame] | 458 | if (cpu_is_omap3630() || cpu_is_omap44xx()) |
Kishore Y | ac01bb7 | 2010-04-25 16:27:19 +0530 | [diff] [blame] | 459 | cinfo->fck_div = prate / (cinfo->fck); |
| 460 | else |
| 461 | cinfo->fck_div = prate / (cinfo->fck / 2); |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 462 | } else { |
| 463 | cinfo->fck_div = 0; |
| 464 | } |
| 465 | |
| 466 | return 0; |
| 467 | } |
| 468 | |
| 469 | unsigned long dss_get_dpll4_rate(void) |
| 470 | { |
Tomi Valkeinen | 0acf659 | 2011-03-14 07:28:57 -0500 | [diff] [blame] | 471 | if (dss.dpll4_m4_ck) |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 472 | return clk_get_rate(clk_get_parent(dss.dpll4_m4_ck)); |
| 473 | else |
| 474 | return 0; |
| 475 | } |
| 476 | |
| 477 | int dss_calc_clock_div(bool is_tft, unsigned long req_pck, |
| 478 | struct dss_clock_info *dss_cinfo, |
| 479 | struct dispc_clock_info *dispc_cinfo) |
| 480 | { |
| 481 | unsigned long prate; |
| 482 | struct dss_clock_info best_dss; |
| 483 | struct dispc_clock_info best_dispc; |
| 484 | |
Archit Taneja | 819d807 | 2011-03-01 11:54:00 +0530 | [diff] [blame] | 485 | unsigned long fck, max_dss_fck; |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 486 | |
Murthy, Raghuveer | 2de1108 | 2011-03-14 07:28:58 -0500 | [diff] [blame] | 487 | u16 fck_div, fck_div_max = 16; |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 488 | |
| 489 | int match = 0; |
| 490 | int min_fck_per_pck; |
| 491 | |
| 492 | prate = dss_get_dpll4_rate(); |
| 493 | |
Taneja, Archit | 31ef823 | 2011-03-14 23:28:22 -0500 | [diff] [blame] | 494 | max_dss_fck = dss_feat_get_param_max(FEAT_PARAM_DSS_FCK); |
Archit Taneja | 819d807 | 2011-03-01 11:54:00 +0530 | [diff] [blame] | 495 | |
Archit Taneja | 6af9cd1 | 2011-01-31 16:27:44 +0000 | [diff] [blame] | 496 | fck = dss_clk_get_rate(DSS_CLK_FCK); |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 497 | if (req_pck == dss.cache_req_pck && |
| 498 | ((cpu_is_omap34xx() && prate == dss.cache_prate) || |
| 499 | dss.cache_dss_cinfo.fck == fck)) { |
| 500 | DSSDBG("dispc clock info found from cache.\n"); |
| 501 | *dss_cinfo = dss.cache_dss_cinfo; |
| 502 | *dispc_cinfo = dss.cache_dispc_cinfo; |
| 503 | return 0; |
| 504 | } |
| 505 | |
| 506 | min_fck_per_pck = CONFIG_OMAP2_DSS_MIN_FCK_PER_PCK; |
| 507 | |
| 508 | if (min_fck_per_pck && |
Archit Taneja | 819d807 | 2011-03-01 11:54:00 +0530 | [diff] [blame] | 509 | req_pck * min_fck_per_pck > max_dss_fck) { |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 510 | DSSERR("Requested pixel clock not possible with the current " |
| 511 | "OMAP2_DSS_MIN_FCK_PER_PCK setting. Turning " |
| 512 | "the constraint off.\n"); |
| 513 | min_fck_per_pck = 0; |
| 514 | } |
| 515 | |
| 516 | retry: |
| 517 | memset(&best_dss, 0, sizeof(best_dss)); |
| 518 | memset(&best_dispc, 0, sizeof(best_dispc)); |
| 519 | |
Murthy, Raghuveer | 2de1108 | 2011-03-14 07:28:58 -0500 | [diff] [blame] | 520 | if (dss.dpll4_m4_ck == NULL) { |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 521 | struct dispc_clock_info cur_dispc; |
| 522 | /* XXX can we change the clock on omap2? */ |
Archit Taneja | 6af9cd1 | 2011-01-31 16:27:44 +0000 | [diff] [blame] | 523 | fck = dss_clk_get_rate(DSS_CLK_FCK); |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 524 | fck_div = 1; |
| 525 | |
| 526 | dispc_find_clk_divs(is_tft, req_pck, fck, &cur_dispc); |
| 527 | match = 1; |
| 528 | |
| 529 | best_dss.fck = fck; |
| 530 | best_dss.fck_div = fck_div; |
| 531 | |
| 532 | best_dispc = cur_dispc; |
| 533 | |
| 534 | goto found; |
Murthy, Raghuveer | 2de1108 | 2011-03-14 07:28:58 -0500 | [diff] [blame] | 535 | } else { |
| 536 | if (cpu_is_omap3630() || cpu_is_omap44xx()) |
| 537 | fck_div_max = 32; |
| 538 | |
| 539 | for (fck_div = fck_div_max; fck_div > 0; --fck_div) { |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 540 | struct dispc_clock_info cur_dispc; |
| 541 | |
Murthy, Raghuveer | 2de1108 | 2011-03-14 07:28:58 -0500 | [diff] [blame] | 542 | if (fck_div_max == 32) |
Kishore Y | ac01bb7 | 2010-04-25 16:27:19 +0530 | [diff] [blame] | 543 | fck = prate / fck_div; |
| 544 | else |
| 545 | fck = prate / fck_div * 2; |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 546 | |
Archit Taneja | 819d807 | 2011-03-01 11:54:00 +0530 | [diff] [blame] | 547 | if (fck > max_dss_fck) |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 548 | continue; |
| 549 | |
| 550 | if (min_fck_per_pck && |
| 551 | fck < req_pck * min_fck_per_pck) |
| 552 | continue; |
| 553 | |
| 554 | match = 1; |
| 555 | |
| 556 | dispc_find_clk_divs(is_tft, req_pck, fck, &cur_dispc); |
| 557 | |
| 558 | if (abs(cur_dispc.pck - req_pck) < |
| 559 | abs(best_dispc.pck - req_pck)) { |
| 560 | |
| 561 | best_dss.fck = fck; |
| 562 | best_dss.fck_div = fck_div; |
| 563 | |
| 564 | best_dispc = cur_dispc; |
| 565 | |
| 566 | if (cur_dispc.pck == req_pck) |
| 567 | goto found; |
| 568 | } |
| 569 | } |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 570 | } |
| 571 | |
| 572 | found: |
| 573 | if (!match) { |
| 574 | if (min_fck_per_pck) { |
| 575 | DSSERR("Could not find suitable clock settings.\n" |
| 576 | "Turning FCK/PCK constraint off and" |
| 577 | "trying again.\n"); |
| 578 | min_fck_per_pck = 0; |
| 579 | goto retry; |
| 580 | } |
| 581 | |
| 582 | DSSERR("Could not find suitable clock settings.\n"); |
| 583 | |
| 584 | return -EINVAL; |
| 585 | } |
| 586 | |
| 587 | if (dss_cinfo) |
| 588 | *dss_cinfo = best_dss; |
| 589 | if (dispc_cinfo) |
| 590 | *dispc_cinfo = best_dispc; |
| 591 | |
| 592 | dss.cache_req_pck = req_pck; |
| 593 | dss.cache_prate = prate; |
| 594 | dss.cache_dss_cinfo = best_dss; |
| 595 | dss.cache_dispc_cinfo = best_dispc; |
| 596 | |
| 597 | return 0; |
| 598 | } |
| 599 | |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 600 | static int _omap_dss_wait_reset(void) |
| 601 | { |
Tomi Valkeinen | 24be78b | 2010-01-07 14:19:48 +0200 | [diff] [blame] | 602 | int t = 0; |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 603 | |
| 604 | while (REG_GET(DSS_SYSSTATUS, 0, 0) == 0) { |
Tomi Valkeinen | 24be78b | 2010-01-07 14:19:48 +0200 | [diff] [blame] | 605 | if (++t > 1000) { |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 606 | DSSERR("soft reset failed\n"); |
| 607 | return -ENODEV; |
| 608 | } |
Tomi Valkeinen | 24be78b | 2010-01-07 14:19:48 +0200 | [diff] [blame] | 609 | udelay(1); |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 610 | } |
| 611 | |
| 612 | return 0; |
| 613 | } |
| 614 | |
| 615 | static int _omap_dss_reset(void) |
| 616 | { |
| 617 | /* Soft reset */ |
| 618 | REG_FLD_MOD(DSS_SYSCONFIG, 1, 1, 1); |
| 619 | return _omap_dss_wait_reset(); |
| 620 | } |
| 621 | |
| 622 | void dss_set_venc_output(enum omap_dss_venc_type type) |
| 623 | { |
| 624 | int l = 0; |
| 625 | |
| 626 | if (type == OMAP_DSS_VENC_TYPE_COMPOSITE) |
| 627 | l = 0; |
| 628 | else if (type == OMAP_DSS_VENC_TYPE_SVIDEO) |
| 629 | l = 1; |
| 630 | else |
| 631 | BUG(); |
| 632 | |
| 633 | /* venc out selection. 0 = comp, 1 = svideo */ |
| 634 | REG_FLD_MOD(DSS_CONTROL, l, 6, 6); |
| 635 | } |
| 636 | |
| 637 | void dss_set_dac_pwrdn_bgz(bool enable) |
| 638 | { |
| 639 | REG_FLD_MOD(DSS_CONTROL, enable, 5, 5); /* DAC Power-Down Control */ |
| 640 | } |
| 641 | |
Mythri P K | 7ed024a | 2011-03-09 16:31:38 +0530 | [diff] [blame] | 642 | void dss_select_hdmi_venc_clk_source(enum dss_hdmi_venc_clk_source_select hdmi) |
| 643 | { |
| 644 | REG_FLD_MOD(DSS_CONTROL, hdmi, 15, 15); /* VENC_HDMI_SWITCH */ |
| 645 | } |
| 646 | |
Tomi Valkeinen | 42c9dee | 2011-03-02 12:29:27 +0200 | [diff] [blame] | 647 | static int dss_init(void) |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 648 | { |
| 649 | int r; |
| 650 | u32 rev; |
Senthilvadivu Guruswamy | ea9da36 | 2011-01-24 06:22:04 +0000 | [diff] [blame] | 651 | struct resource *dss_mem; |
Tomi Valkeinen | 0acf659 | 2011-03-14 07:28:57 -0500 | [diff] [blame] | 652 | struct clk *dpll4_m4_ck; |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 653 | |
Senthilvadivu Guruswamy | ea9da36 | 2011-01-24 06:22:04 +0000 | [diff] [blame] | 654 | dss_mem = platform_get_resource(dss.pdev, IORESOURCE_MEM, 0); |
| 655 | if (!dss_mem) { |
| 656 | DSSERR("can't get IORESOURCE_MEM DSS\n"); |
| 657 | r = -EINVAL; |
| 658 | goto fail0; |
| 659 | } |
| 660 | dss.base = ioremap(dss_mem->start, resource_size(dss_mem)); |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 661 | if (!dss.base) { |
| 662 | DSSERR("can't ioremap DSS\n"); |
| 663 | r = -ENOMEM; |
| 664 | goto fail0; |
| 665 | } |
| 666 | |
Tomi Valkeinen | 42c9dee | 2011-03-02 12:29:27 +0200 | [diff] [blame] | 667 | /* disable LCD and DIGIT output. This seems to fix the synclost |
| 668 | * problem that we get, if the bootloader starts the DSS and |
| 669 | * the kernel resets it */ |
| 670 | omap_writel(omap_readl(0x48050440) & ~0x3, 0x48050440); |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 671 | |
Tomi Valkeinen | f1aafdc | 2010-06-02 17:31:53 +0300 | [diff] [blame] | 672 | #ifdef CONFIG_OMAP2_DSS_SLEEP_BEFORE_RESET |
Tomi Valkeinen | 42c9dee | 2011-03-02 12:29:27 +0200 | [diff] [blame] | 673 | /* We need to wait here a bit, otherwise we sometimes start to |
| 674 | * get synclost errors, and after that only power cycle will |
| 675 | * restore DSS functionality. I have no idea why this happens. |
| 676 | * And we have to wait _before_ resetting the DSS, but after |
| 677 | * enabling clocks. |
Tomi Valkeinen | f1aafdc | 2010-06-02 17:31:53 +0300 | [diff] [blame] | 678 | * |
| 679 | * This bug was at least present on OMAP3430. It's unknown |
| 680 | * if it happens on OMAP2 or OMAP3630. |
Tomi Valkeinen | 42c9dee | 2011-03-02 12:29:27 +0200 | [diff] [blame] | 681 | */ |
| 682 | msleep(50); |
Tomi Valkeinen | f1aafdc | 2010-06-02 17:31:53 +0300 | [diff] [blame] | 683 | #endif |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 684 | |
Tomi Valkeinen | 42c9dee | 2011-03-02 12:29:27 +0200 | [diff] [blame] | 685 | _omap_dss_reset(); |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 686 | |
| 687 | /* autoidle */ |
| 688 | REG_FLD_MOD(DSS_SYSCONFIG, 1, 0, 0); |
| 689 | |
| 690 | /* Select DPLL */ |
| 691 | REG_FLD_MOD(DSS_CONTROL, 0, 0, 0); |
| 692 | |
| 693 | #ifdef CONFIG_OMAP2_DSS_VENC |
| 694 | REG_FLD_MOD(DSS_CONTROL, 1, 4, 4); /* venc dac demen */ |
| 695 | REG_FLD_MOD(DSS_CONTROL, 1, 3, 3); /* venc clock 4x enable */ |
| 696 | REG_FLD_MOD(DSS_CONTROL, 0, 2, 2); /* venc clock mode = normal */ |
| 697 | #endif |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 698 | if (cpu_is_omap34xx()) { |
Tomi Valkeinen | 0acf659 | 2011-03-14 07:28:57 -0500 | [diff] [blame] | 699 | dpll4_m4_ck = clk_get(NULL, "dpll4_m4_ck"); |
| 700 | if (IS_ERR(dpll4_m4_ck)) { |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 701 | DSSERR("Failed to get dpll4_m4_ck\n"); |
Tomi Valkeinen | 0acf659 | 2011-03-14 07:28:57 -0500 | [diff] [blame] | 702 | r = PTR_ERR(dpll4_m4_ck); |
archit taneja | affe360 | 2011-02-23 08:41:03 +0000 | [diff] [blame] | 703 | goto fail1; |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 704 | } |
Murthy, Raghuveer | 2de1108 | 2011-03-14 07:28:58 -0500 | [diff] [blame] | 705 | } else if (cpu_is_omap44xx()) { |
| 706 | dpll4_m4_ck = clk_get(NULL, "dpll_per_m5x2_ck"); |
| 707 | if (IS_ERR(dpll4_m4_ck)) { |
| 708 | DSSERR("Failed to get dpll4_m4_ck\n"); |
| 709 | r = PTR_ERR(dpll4_m4_ck); |
| 710 | goto fail1; |
| 711 | } |
Tomi Valkeinen | 0acf659 | 2011-03-14 07:28:57 -0500 | [diff] [blame] | 712 | } else { /* omap24xx */ |
| 713 | dpll4_m4_ck = NULL; |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 714 | } |
| 715 | |
Tomi Valkeinen | 0acf659 | 2011-03-14 07:28:57 -0500 | [diff] [blame] | 716 | dss.dpll4_m4_ck = dpll4_m4_ck; |
| 717 | |
Archit Taneja | 89a35e5 | 2011-04-12 13:52:23 +0530 | [diff] [blame] | 718 | dss.dsi_clk_source = OMAP_DSS_CLK_SRC_FCK; |
| 719 | dss.dispc_clk_source = OMAP_DSS_CLK_SRC_FCK; |
| 720 | dss.lcd_clk_source[0] = OMAP_DSS_CLK_SRC_FCK; |
| 721 | dss.lcd_clk_source[1] = OMAP_DSS_CLK_SRC_FCK; |
Tomi Valkeinen | ce619e1 | 2010-03-12 12:46:05 +0200 | [diff] [blame] | 722 | |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 723 | dss_save_context(); |
| 724 | |
| 725 | rev = dss_read_reg(DSS_REVISION); |
| 726 | printk(KERN_INFO "OMAP DSS rev %d.%d\n", |
| 727 | FLD_GET(rev, 7, 4), FLD_GET(rev, 3, 0)); |
| 728 | |
| 729 | return 0; |
| 730 | |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 731 | fail1: |
| 732 | iounmap(dss.base); |
| 733 | fail0: |
| 734 | return r; |
| 735 | } |
| 736 | |
Senthilvadivu Guruswamy | 96c401b | 2011-01-24 06:21:57 +0000 | [diff] [blame] | 737 | static void dss_exit(void) |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 738 | { |
Tomi Valkeinen | 0acf659 | 2011-03-14 07:28:57 -0500 | [diff] [blame] | 739 | if (dss.dpll4_m4_ck) |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 740 | clk_put(dss.dpll4_m4_ck); |
| 741 | |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 742 | iounmap(dss.base); |
| 743 | } |
| 744 | |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 745 | /* CONTEXT */ |
| 746 | static int dss_get_ctx_id(void) |
| 747 | { |
| 748 | struct omap_display_platform_data *pdata = dss.pdev->dev.platform_data; |
| 749 | int r; |
| 750 | |
| 751 | if (!pdata->board_data->get_last_off_on_transaction_id) |
| 752 | return 0; |
| 753 | r = pdata->board_data->get_last_off_on_transaction_id(&dss.pdev->dev); |
| 754 | if (r < 0) { |
| 755 | dev_err(&dss.pdev->dev, "getting transaction ID failed, " |
| 756 | "will force context restore\n"); |
| 757 | r = -1; |
| 758 | } |
| 759 | return r; |
| 760 | } |
| 761 | |
| 762 | int dss_need_ctx_restore(void) |
| 763 | { |
| 764 | int id = dss_get_ctx_id(); |
| 765 | |
| 766 | if (id < 0 || id != dss.ctx_id) { |
| 767 | DSSDBG("ctx id %d -> id %d\n", |
| 768 | dss.ctx_id, id); |
| 769 | dss.ctx_id = id; |
| 770 | return 1; |
| 771 | } else { |
| 772 | return 0; |
| 773 | } |
| 774 | } |
| 775 | |
| 776 | static void save_all_ctx(void) |
| 777 | { |
| 778 | DSSDBG("save context\n"); |
| 779 | |
Archit Taneja | 6af9cd1 | 2011-01-31 16:27:44 +0000 | [diff] [blame] | 780 | dss_clk_enable_no_ctx(DSS_CLK_ICK | DSS_CLK_FCK); |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 781 | |
| 782 | dss_save_context(); |
| 783 | dispc_save_context(); |
| 784 | #ifdef CONFIG_OMAP2_DSS_DSI |
| 785 | dsi_save_context(); |
| 786 | #endif |
| 787 | |
Archit Taneja | 6af9cd1 | 2011-01-31 16:27:44 +0000 | [diff] [blame] | 788 | dss_clk_disable_no_ctx(DSS_CLK_ICK | DSS_CLK_FCK); |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 789 | } |
| 790 | |
| 791 | static void restore_all_ctx(void) |
| 792 | { |
| 793 | DSSDBG("restore context\n"); |
| 794 | |
| 795 | dss_clk_enable_all_no_ctx(); |
| 796 | |
| 797 | dss_restore_context(); |
| 798 | dispc_restore_context(); |
| 799 | #ifdef CONFIG_OMAP2_DSS_DSI |
| 800 | dsi_restore_context(); |
| 801 | #endif |
| 802 | |
| 803 | dss_clk_disable_all_no_ctx(); |
| 804 | } |
| 805 | |
| 806 | static int dss_get_clock(struct clk **clock, const char *clk_name) |
| 807 | { |
| 808 | struct clk *clk; |
| 809 | |
| 810 | clk = clk_get(&dss.pdev->dev, clk_name); |
| 811 | |
| 812 | if (IS_ERR(clk)) { |
| 813 | DSSERR("can't get clock %s", clk_name); |
| 814 | return PTR_ERR(clk); |
| 815 | } |
| 816 | |
| 817 | *clock = clk; |
| 818 | |
| 819 | DSSDBG("clk %s, rate %ld\n", clk_name, clk_get_rate(clk)); |
| 820 | |
| 821 | return 0; |
| 822 | } |
| 823 | |
| 824 | static int dss_get_clocks(void) |
| 825 | { |
| 826 | int r; |
Semwal, Sumit | a1a0dcc | 2011-03-01 02:42:14 -0600 | [diff] [blame] | 827 | struct omap_display_platform_data *pdata = dss.pdev->dev.platform_data; |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 828 | |
| 829 | dss.dss_ick = NULL; |
Archit Taneja | c7642f6 | 2011-01-31 16:27:45 +0000 | [diff] [blame] | 830 | dss.dss_fck = NULL; |
| 831 | dss.dss_sys_clk = NULL; |
| 832 | dss.dss_tv_fck = NULL; |
| 833 | dss.dss_video_fck = NULL; |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 834 | |
| 835 | r = dss_get_clock(&dss.dss_ick, "ick"); |
| 836 | if (r) |
| 837 | goto err; |
| 838 | |
Archit Taneja | c7642f6 | 2011-01-31 16:27:45 +0000 | [diff] [blame] | 839 | r = dss_get_clock(&dss.dss_fck, "fck"); |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 840 | if (r) |
| 841 | goto err; |
| 842 | |
Semwal, Sumit | a1a0dcc | 2011-03-01 02:42:14 -0600 | [diff] [blame] | 843 | if (!pdata->opt_clock_available) { |
| 844 | r = -ENODEV; |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 845 | goto err; |
Semwal, Sumit | a1a0dcc | 2011-03-01 02:42:14 -0600 | [diff] [blame] | 846 | } |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 847 | |
Semwal, Sumit | a1a0dcc | 2011-03-01 02:42:14 -0600 | [diff] [blame] | 848 | if (pdata->opt_clock_available("sys_clk")) { |
| 849 | r = dss_get_clock(&dss.dss_sys_clk, "sys_clk"); |
| 850 | if (r) |
| 851 | goto err; |
| 852 | } |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 853 | |
Semwal, Sumit | a1a0dcc | 2011-03-01 02:42:14 -0600 | [diff] [blame] | 854 | if (pdata->opt_clock_available("tv_clk")) { |
| 855 | r = dss_get_clock(&dss.dss_tv_fck, "tv_clk"); |
| 856 | if (r) |
| 857 | goto err; |
| 858 | } |
| 859 | |
| 860 | if (pdata->opt_clock_available("video_clk")) { |
| 861 | r = dss_get_clock(&dss.dss_video_fck, "video_clk"); |
| 862 | if (r) |
| 863 | goto err; |
| 864 | } |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 865 | |
| 866 | return 0; |
| 867 | |
| 868 | err: |
| 869 | if (dss.dss_ick) |
| 870 | clk_put(dss.dss_ick); |
Archit Taneja | c7642f6 | 2011-01-31 16:27:45 +0000 | [diff] [blame] | 871 | if (dss.dss_fck) |
| 872 | clk_put(dss.dss_fck); |
| 873 | if (dss.dss_sys_clk) |
| 874 | clk_put(dss.dss_sys_clk); |
| 875 | if (dss.dss_tv_fck) |
| 876 | clk_put(dss.dss_tv_fck); |
| 877 | if (dss.dss_video_fck) |
| 878 | clk_put(dss.dss_video_fck); |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 879 | |
| 880 | return r; |
| 881 | } |
| 882 | |
| 883 | static void dss_put_clocks(void) |
| 884 | { |
Archit Taneja | c7642f6 | 2011-01-31 16:27:45 +0000 | [diff] [blame] | 885 | if (dss.dss_video_fck) |
| 886 | clk_put(dss.dss_video_fck); |
Semwal, Sumit | a1a0dcc | 2011-03-01 02:42:14 -0600 | [diff] [blame] | 887 | if (dss.dss_tv_fck) |
| 888 | clk_put(dss.dss_tv_fck); |
| 889 | if (dss.dss_sys_clk) |
| 890 | clk_put(dss.dss_sys_clk); |
Archit Taneja | c7642f6 | 2011-01-31 16:27:45 +0000 | [diff] [blame] | 891 | clk_put(dss.dss_fck); |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 892 | clk_put(dss.dss_ick); |
| 893 | } |
| 894 | |
| 895 | unsigned long dss_clk_get_rate(enum dss_clock clk) |
| 896 | { |
| 897 | switch (clk) { |
| 898 | case DSS_CLK_ICK: |
| 899 | return clk_get_rate(dss.dss_ick); |
Archit Taneja | 6af9cd1 | 2011-01-31 16:27:44 +0000 | [diff] [blame] | 900 | case DSS_CLK_FCK: |
Archit Taneja | c7642f6 | 2011-01-31 16:27:45 +0000 | [diff] [blame] | 901 | return clk_get_rate(dss.dss_fck); |
Archit Taneja | 6af9cd1 | 2011-01-31 16:27:44 +0000 | [diff] [blame] | 902 | case DSS_CLK_SYSCK: |
Archit Taneja | c7642f6 | 2011-01-31 16:27:45 +0000 | [diff] [blame] | 903 | return clk_get_rate(dss.dss_sys_clk); |
Archit Taneja | 6af9cd1 | 2011-01-31 16:27:44 +0000 | [diff] [blame] | 904 | case DSS_CLK_TVFCK: |
Archit Taneja | c7642f6 | 2011-01-31 16:27:45 +0000 | [diff] [blame] | 905 | return clk_get_rate(dss.dss_tv_fck); |
Archit Taneja | 6af9cd1 | 2011-01-31 16:27:44 +0000 | [diff] [blame] | 906 | case DSS_CLK_VIDFCK: |
Archit Taneja | c7642f6 | 2011-01-31 16:27:45 +0000 | [diff] [blame] | 907 | return clk_get_rate(dss.dss_video_fck); |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 908 | } |
| 909 | |
| 910 | BUG(); |
| 911 | return 0; |
| 912 | } |
| 913 | |
| 914 | static unsigned count_clk_bits(enum dss_clock clks) |
| 915 | { |
| 916 | unsigned num_clks = 0; |
| 917 | |
| 918 | if (clks & DSS_CLK_ICK) |
| 919 | ++num_clks; |
Archit Taneja | 6af9cd1 | 2011-01-31 16:27:44 +0000 | [diff] [blame] | 920 | if (clks & DSS_CLK_FCK) |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 921 | ++num_clks; |
Archit Taneja | 6af9cd1 | 2011-01-31 16:27:44 +0000 | [diff] [blame] | 922 | if (clks & DSS_CLK_SYSCK) |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 923 | ++num_clks; |
Archit Taneja | 6af9cd1 | 2011-01-31 16:27:44 +0000 | [diff] [blame] | 924 | if (clks & DSS_CLK_TVFCK) |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 925 | ++num_clks; |
Archit Taneja | 6af9cd1 | 2011-01-31 16:27:44 +0000 | [diff] [blame] | 926 | if (clks & DSS_CLK_VIDFCK) |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 927 | ++num_clks; |
| 928 | |
| 929 | return num_clks; |
| 930 | } |
| 931 | |
| 932 | static void dss_clk_enable_no_ctx(enum dss_clock clks) |
| 933 | { |
| 934 | unsigned num_clks = count_clk_bits(clks); |
| 935 | |
| 936 | if (clks & DSS_CLK_ICK) |
| 937 | clk_enable(dss.dss_ick); |
Archit Taneja | 6af9cd1 | 2011-01-31 16:27:44 +0000 | [diff] [blame] | 938 | if (clks & DSS_CLK_FCK) |
Archit Taneja | c7642f6 | 2011-01-31 16:27:45 +0000 | [diff] [blame] | 939 | clk_enable(dss.dss_fck); |
Semwal, Sumit | a1a0dcc | 2011-03-01 02:42:14 -0600 | [diff] [blame] | 940 | if ((clks & DSS_CLK_SYSCK) && dss.dss_sys_clk) |
Archit Taneja | c7642f6 | 2011-01-31 16:27:45 +0000 | [diff] [blame] | 941 | clk_enable(dss.dss_sys_clk); |
Semwal, Sumit | a1a0dcc | 2011-03-01 02:42:14 -0600 | [diff] [blame] | 942 | if ((clks & DSS_CLK_TVFCK) && dss.dss_tv_fck) |
Archit Taneja | c7642f6 | 2011-01-31 16:27:45 +0000 | [diff] [blame] | 943 | clk_enable(dss.dss_tv_fck); |
Semwal, Sumit | a1a0dcc | 2011-03-01 02:42:14 -0600 | [diff] [blame] | 944 | if ((clks & DSS_CLK_VIDFCK) && dss.dss_video_fck) |
Archit Taneja | c7642f6 | 2011-01-31 16:27:45 +0000 | [diff] [blame] | 945 | clk_enable(dss.dss_video_fck); |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 946 | |
| 947 | dss.num_clks_enabled += num_clks; |
| 948 | } |
| 949 | |
| 950 | void dss_clk_enable(enum dss_clock clks) |
| 951 | { |
| 952 | bool check_ctx = dss.num_clks_enabled == 0; |
| 953 | |
| 954 | dss_clk_enable_no_ctx(clks); |
| 955 | |
Tomi Valkeinen | 85604b0 | 2011-03-03 13:16:23 +0200 | [diff] [blame] | 956 | /* |
| 957 | * HACK: On omap4 the registers may not be accessible right after |
| 958 | * enabling the clocks. At some point this will be handled by |
| 959 | * pm_runtime, but for the time begin this should make things work. |
| 960 | */ |
| 961 | if (cpu_is_omap44xx() && check_ctx) |
| 962 | udelay(10); |
| 963 | |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 964 | if (check_ctx && cpu_is_omap34xx() && dss_need_ctx_restore()) |
| 965 | restore_all_ctx(); |
| 966 | } |
| 967 | |
| 968 | static void dss_clk_disable_no_ctx(enum dss_clock clks) |
| 969 | { |
| 970 | unsigned num_clks = count_clk_bits(clks); |
| 971 | |
| 972 | if (clks & DSS_CLK_ICK) |
| 973 | clk_disable(dss.dss_ick); |
Archit Taneja | 6af9cd1 | 2011-01-31 16:27:44 +0000 | [diff] [blame] | 974 | if (clks & DSS_CLK_FCK) |
Archit Taneja | c7642f6 | 2011-01-31 16:27:45 +0000 | [diff] [blame] | 975 | clk_disable(dss.dss_fck); |
Semwal, Sumit | a1a0dcc | 2011-03-01 02:42:14 -0600 | [diff] [blame] | 976 | if ((clks & DSS_CLK_SYSCK) && dss.dss_sys_clk) |
Archit Taneja | c7642f6 | 2011-01-31 16:27:45 +0000 | [diff] [blame] | 977 | clk_disable(dss.dss_sys_clk); |
Semwal, Sumit | a1a0dcc | 2011-03-01 02:42:14 -0600 | [diff] [blame] | 978 | if ((clks & DSS_CLK_TVFCK) && dss.dss_tv_fck) |
Archit Taneja | c7642f6 | 2011-01-31 16:27:45 +0000 | [diff] [blame] | 979 | clk_disable(dss.dss_tv_fck); |
Semwal, Sumit | a1a0dcc | 2011-03-01 02:42:14 -0600 | [diff] [blame] | 980 | if ((clks & DSS_CLK_VIDFCK) && dss.dss_video_fck) |
Archit Taneja | c7642f6 | 2011-01-31 16:27:45 +0000 | [diff] [blame] | 981 | clk_disable(dss.dss_video_fck); |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 982 | |
| 983 | dss.num_clks_enabled -= num_clks; |
| 984 | } |
| 985 | |
| 986 | void dss_clk_disable(enum dss_clock clks) |
| 987 | { |
| 988 | if (cpu_is_omap34xx()) { |
| 989 | unsigned num_clks = count_clk_bits(clks); |
| 990 | |
| 991 | BUG_ON(dss.num_clks_enabled < num_clks); |
| 992 | |
| 993 | if (dss.num_clks_enabled == num_clks) |
| 994 | save_all_ctx(); |
| 995 | } |
| 996 | |
| 997 | dss_clk_disable_no_ctx(clks); |
| 998 | } |
| 999 | |
| 1000 | static void dss_clk_enable_all_no_ctx(void) |
| 1001 | { |
| 1002 | enum dss_clock clks; |
| 1003 | |
Archit Taneja | 6af9cd1 | 2011-01-31 16:27:44 +0000 | [diff] [blame] | 1004 | clks = DSS_CLK_ICK | DSS_CLK_FCK | DSS_CLK_SYSCK | DSS_CLK_TVFCK; |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 1005 | if (cpu_is_omap34xx()) |
Archit Taneja | 6af9cd1 | 2011-01-31 16:27:44 +0000 | [diff] [blame] | 1006 | clks |= DSS_CLK_VIDFCK; |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 1007 | dss_clk_enable_no_ctx(clks); |
| 1008 | } |
| 1009 | |
| 1010 | static void dss_clk_disable_all_no_ctx(void) |
| 1011 | { |
| 1012 | enum dss_clock clks; |
| 1013 | |
Archit Taneja | 6af9cd1 | 2011-01-31 16:27:44 +0000 | [diff] [blame] | 1014 | clks = DSS_CLK_ICK | DSS_CLK_FCK | DSS_CLK_SYSCK | DSS_CLK_TVFCK; |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 1015 | if (cpu_is_omap34xx()) |
Archit Taneja | 6af9cd1 | 2011-01-31 16:27:44 +0000 | [diff] [blame] | 1016 | clks |= DSS_CLK_VIDFCK; |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 1017 | dss_clk_disable_no_ctx(clks); |
| 1018 | } |
| 1019 | |
| 1020 | #if defined(CONFIG_DEBUG_FS) && defined(CONFIG_OMAP2_DSS_DEBUG_SUPPORT) |
| 1021 | /* CLOCKS */ |
| 1022 | static void core_dump_clocks(struct seq_file *s) |
| 1023 | { |
| 1024 | int i; |
| 1025 | struct clk *clocks[5] = { |
| 1026 | dss.dss_ick, |
Archit Taneja | c7642f6 | 2011-01-31 16:27:45 +0000 | [diff] [blame] | 1027 | dss.dss_fck, |
| 1028 | dss.dss_sys_clk, |
| 1029 | dss.dss_tv_fck, |
| 1030 | dss.dss_video_fck |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 1031 | }; |
| 1032 | |
Tomi Valkeinen | ab46d8b | 2011-04-04 09:36:23 +0300 | [diff] [blame] | 1033 | const char *names[5] = { |
| 1034 | "ick", |
| 1035 | "fck", |
| 1036 | "sys_clk", |
| 1037 | "tv_fck", |
| 1038 | "video_fck" |
| 1039 | }; |
| 1040 | |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 1041 | seq_printf(s, "- CORE -\n"); |
| 1042 | |
| 1043 | seq_printf(s, "internal clk count\t\t%u\n", dss.num_clks_enabled); |
| 1044 | |
| 1045 | for (i = 0; i < 5; i++) { |
| 1046 | if (!clocks[i]) |
| 1047 | continue; |
Tomi Valkeinen | ab46d8b | 2011-04-04 09:36:23 +0300 | [diff] [blame] | 1048 | seq_printf(s, "%s (%s)%*s\t%lu\t%d\n", |
| 1049 | names[i], |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 1050 | clocks[i]->name, |
Tomi Valkeinen | ab46d8b | 2011-04-04 09:36:23 +0300 | [diff] [blame] | 1051 | 24 - strlen(names[i]) - strlen(clocks[i]->name), |
| 1052 | "", |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 1053 | clk_get_rate(clocks[i]), |
| 1054 | clocks[i]->usecount); |
| 1055 | } |
| 1056 | } |
| 1057 | #endif /* defined(CONFIG_DEBUG_FS) && defined(CONFIG_OMAP2_DSS_DEBUG_SUPPORT) */ |
| 1058 | |
| 1059 | /* DEBUGFS */ |
| 1060 | #if defined(CONFIG_DEBUG_FS) && defined(CONFIG_OMAP2_DSS_DEBUG_SUPPORT) |
| 1061 | void dss_debug_dump_clocks(struct seq_file *s) |
| 1062 | { |
| 1063 | core_dump_clocks(s); |
| 1064 | dss_dump_clocks(s); |
| 1065 | dispc_dump_clocks(s); |
| 1066 | #ifdef CONFIG_OMAP2_DSS_DSI |
| 1067 | dsi_dump_clocks(s); |
| 1068 | #endif |
| 1069 | } |
| 1070 | #endif |
| 1071 | |
| 1072 | |
Senthilvadivu Guruswamy | 96c401b | 2011-01-24 06:21:57 +0000 | [diff] [blame] | 1073 | /* DSS HW IP initialisation */ |
| 1074 | static int omap_dsshw_probe(struct platform_device *pdev) |
| 1075 | { |
| 1076 | int r; |
Senthilvadivu Guruswamy | 96c401b | 2011-01-24 06:21:57 +0000 | [diff] [blame] | 1077 | |
| 1078 | dss.pdev = pdev; |
| 1079 | |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 1080 | r = dss_get_clocks(); |
| 1081 | if (r) |
| 1082 | goto err_clocks; |
| 1083 | |
| 1084 | dss_clk_enable_all_no_ctx(); |
| 1085 | |
| 1086 | dss.ctx_id = dss_get_ctx_id(); |
| 1087 | DSSDBG("initial ctx id %u\n", dss.ctx_id); |
| 1088 | |
Tomi Valkeinen | 42c9dee | 2011-03-02 12:29:27 +0200 | [diff] [blame] | 1089 | r = dss_init(); |
Senthilvadivu Guruswamy | 96c401b | 2011-01-24 06:21:57 +0000 | [diff] [blame] | 1090 | if (r) { |
| 1091 | DSSERR("Failed to initialize DSS\n"); |
| 1092 | goto err_dss; |
| 1093 | } |
| 1094 | |
Tomi Valkeinen | 587b5e8 | 2011-03-02 12:47:54 +0200 | [diff] [blame] | 1095 | r = dpi_init(); |
| 1096 | if (r) { |
| 1097 | DSSERR("Failed to initialize DPI\n"); |
| 1098 | goto err_dpi; |
| 1099 | } |
| 1100 | |
| 1101 | r = sdi_init(); |
| 1102 | if (r) { |
| 1103 | DSSERR("Failed to initialize SDI\n"); |
| 1104 | goto err_sdi; |
| 1105 | } |
| 1106 | |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 1107 | dss_clk_disable_all_no_ctx(); |
| 1108 | return 0; |
Tomi Valkeinen | 587b5e8 | 2011-03-02 12:47:54 +0200 | [diff] [blame] | 1109 | err_sdi: |
| 1110 | dpi_exit(); |
| 1111 | err_dpi: |
| 1112 | dss_exit(); |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 1113 | err_dss: |
| 1114 | dss_clk_disable_all_no_ctx(); |
| 1115 | dss_put_clocks(); |
| 1116 | err_clocks: |
Senthilvadivu Guruswamy | 96c401b | 2011-01-24 06:21:57 +0000 | [diff] [blame] | 1117 | return r; |
| 1118 | } |
| 1119 | |
| 1120 | static int omap_dsshw_remove(struct platform_device *pdev) |
| 1121 | { |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 1122 | |
Senthilvadivu Guruswamy | 96c401b | 2011-01-24 06:21:57 +0000 | [diff] [blame] | 1123 | dss_exit(); |
| 1124 | |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 1125 | /* |
| 1126 | * As part of hwmod changes, DSS is not the only controller of dss |
| 1127 | * clocks; hwmod framework itself will also enable clocks during hwmod |
| 1128 | * init for dss, and autoidle is set in h/w for DSS. Hence, there's no |
| 1129 | * need to disable clocks if their usecounts > 1. |
| 1130 | */ |
| 1131 | WARN_ON(dss.num_clks_enabled > 0); |
| 1132 | |
| 1133 | dss_put_clocks(); |
Senthilvadivu Guruswamy | 96c401b | 2011-01-24 06:21:57 +0000 | [diff] [blame] | 1134 | return 0; |
| 1135 | } |
| 1136 | |
| 1137 | static struct platform_driver omap_dsshw_driver = { |
| 1138 | .probe = omap_dsshw_probe, |
| 1139 | .remove = omap_dsshw_remove, |
| 1140 | .driver = { |
| 1141 | .name = "omapdss_dss", |
| 1142 | .owner = THIS_MODULE, |
| 1143 | }, |
| 1144 | }; |
| 1145 | |
| 1146 | int dss_init_platform_driver(void) |
| 1147 | { |
| 1148 | return platform_driver_register(&omap_dsshw_driver); |
| 1149 | } |
| 1150 | |
| 1151 | void dss_uninit_platform_driver(void) |
| 1152 | { |
| 1153 | return platform_driver_unregister(&omap_dsshw_driver); |
| 1154 | } |