paul@0 | 1 | /* |
paul@0 | 2 | * Common LCD device support for the JZ4740 and related SoCs. |
paul@0 | 3 | * |
paul@142 | 4 | * Copyright (C) 2018, 2020, 2023 Paul Boddie <paul@boddie.org.uk> |
paul@0 | 5 | * |
paul@0 | 6 | * This program is free software; you can redistribute it and/or |
paul@0 | 7 | * modify it under the terms of the GNU General Public License as |
paul@0 | 8 | * published by the Free Software Foundation; either version 2 of |
paul@0 | 9 | * the License, or (at your option) any later version. |
paul@0 | 10 | * |
paul@0 | 11 | * This program is distributed in the hope that it will be useful, |
paul@0 | 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
paul@0 | 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
paul@0 | 14 | * GNU General Public License for more details. |
paul@0 | 15 | * |
paul@0 | 16 | * You should have received a copy of the GNU General Public License |
paul@0 | 17 | * along with this program; if not, write to the Free Software |
paul@0 | 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, |
paul@0 | 19 | * Boston, MA 02110-1301, USA |
paul@0 | 20 | */ |
paul@0 | 21 | |
paul@0 | 22 | #include <l4/devices/cpm-client.h> |
paul@0 | 23 | #include <l4/devices/display-client.h> |
paul@0 | 24 | #include <l4/devices/lcd-jz4740.h> |
paul@82 | 25 | #include <l4/devices/lcd-jz4780.h> |
paul@39 | 26 | #include <l4/devices/panel-loader.h> |
paul@0 | 27 | #include <l4/devices/memory.h> |
paul@0 | 28 | #include "lcd-jz4740-device.h" |
paul@0 | 29 | |
paul@0 | 30 | #include <l4/re/dataspace> |
paul@142 | 31 | #include <l4/re/dma_space> |
paul@0 | 32 | #include <l4/re/env> |
paul@0 | 33 | #include <l4/re/mem_alloc> |
paul@0 | 34 | #include <l4/re/rm> |
paul@0 | 35 | #include <l4/re/util/cap_alloc> |
paul@142 | 36 | #include <l4/sys/factory> |
paul@0 | 37 | #include <l4/sys/types.h> |
paul@142 | 38 | #include <l4/vbus/vbus> |
paul@0 | 39 | |
paul@0 | 40 | #include <stdint.h> |
paul@0 | 41 | |
paul@0 | 42 | // Virtual addresses for the LCD register block. |
paul@0 | 43 | |
paul@0 | 44 | static l4_addr_t lcd_virt_base = 0, lcd_virt_base_end = 0; |
paul@0 | 45 | |
paul@24 | 46 | // LCD, CPM and display device abstractions. |
paul@0 | 47 | |
paul@0 | 48 | static Lcd_jz4740_chip *lcd_chip = 0; |
paul@0 | 49 | |
paul@0 | 50 | static L4::Cap<Cpm_device_interface> cpm_device; |
paul@0 | 51 | static L4::Cap<Display_device_interface> display_device; |
paul@0 | 52 | |
paul@0 | 53 | |
paul@0 | 54 | |
paul@0 | 55 | // CPM operations. |
paul@0 | 56 | |
paul@0 | 57 | static void set_timing() |
paul@0 | 58 | { |
paul@0 | 59 | uint32_t pclk = lcd_chip->get_pixel_clock(); |
paul@0 | 60 | |
paul@0 | 61 | cpm_device->stop_lcd(); |
paul@0 | 62 | |
paul@0 | 63 | // Original comment: LCDClock > 2.5*Pixclock |
paul@0 | 64 | // However, the documentation indicates that a TFT panel needs a device clock |
paul@0 | 65 | // 1.5 times that of the pixel clock, and a STN panel needs a device clock 3 |
paul@0 | 66 | // times that of the pixel clock. |
paul@0 | 67 | |
paul@0 | 68 | cpm_device->set_lcd_frequencies(pclk, 3); |
paul@0 | 69 | cpm_device->update_output_frequency(); |
paul@0 | 70 | cpm_device->start_lcd(); |
paul@0 | 71 | |
paul@0 | 72 | l4_sleep(1); // 1ms == 1000us |
paul@0 | 73 | } |
paul@0 | 74 | |
paul@0 | 75 | |
paul@0 | 76 | |
paul@0 | 77 | // Disable the display. |
paul@0 | 78 | |
paul@0 | 79 | void |
paul@0 | 80 | Lcd_jz4740_device::disable() |
paul@0 | 81 | { |
paul@0 | 82 | Lcd_jz4740_chip *chip = static_cast<Lcd_jz4740_chip *>(_chip); |
paul@0 | 83 | |
paul@0 | 84 | disable_display(); |
paul@0 | 85 | chip->disable(); |
paul@0 | 86 | } |
paul@0 | 87 | |
paul@0 | 88 | // Configure the peripheral and enable the display. |
paul@0 | 89 | |
paul@0 | 90 | void |
paul@0 | 91 | Lcd_jz4740_device::enable() |
paul@0 | 92 | { |
paul@0 | 93 | Lcd_jz4740_chip *chip = static_cast<Lcd_jz4740_chip *>(_chip); |
paul@0 | 94 | |
paul@82 | 95 | // Initialise the clocks for the LCD controller. Without this, the controller |
paul@82 | 96 | // cannot be operated. |
paul@82 | 97 | |
paul@82 | 98 | set_timing(); |
paul@82 | 99 | |
paul@82 | 100 | // Configure the controller. |
paul@82 | 101 | |
paul@0 | 102 | chip->disable(); |
paul@0 | 103 | chip->config((struct Jz4740_lcd_descriptor *) desc_vaddr, |
paul@0 | 104 | (struct Jz4740_lcd_descriptor *) desc_paddr, |
paul@0 | 105 | fb_paddr); |
paul@0 | 106 | |
paul@82 | 107 | // Activate the display channel. |
paul@0 | 108 | |
paul@0 | 109 | enable_display(); |
paul@0 | 110 | |
paul@82 | 111 | // Activate the controller output. |
paul@82 | 112 | |
paul@0 | 113 | chip->enable(); |
paul@0 | 114 | } |
paul@0 | 115 | |
paul@0 | 116 | // Set up memory addresses for the peripheral, initialising the framebuffer and |
paul@0 | 117 | // descriptor members. |
paul@0 | 118 | |
paul@0 | 119 | int |
paul@0 | 120 | Lcd_jz4740_device::_setup_memory() |
paul@0 | 121 | { |
paul@0 | 122 | // Framebuffer and descriptor sizes. |
paul@0 | 123 | |
paul@0 | 124 | unsigned long fb_size, desc_size; |
paul@0 | 125 | |
paul@0 | 126 | // Size of physically contiguous regions to be allocated. |
paul@0 | 127 | |
paul@0 | 128 | l4_size_t fb_size_out, desc_size_out; |
paul@0 | 129 | |
paul@142 | 130 | // Memory allocation capabilities. |
paul@0 | 131 | |
paul@0 | 132 | L4::Cap<L4Re::Dataspace> descmem; |
paul@142 | 133 | L4::Cap<L4Re::Dma_space> dma; |
paul@0 | 134 | |
paul@0 | 135 | // Test for existing setup. |
paul@0 | 136 | |
paul@0 | 137 | if (fb_vaddr) |
paul@0 | 138 | return 0; |
paul@0 | 139 | |
paul@0 | 140 | // Obtain capabilities for allocating memory. |
paul@0 | 141 | |
paul@0 | 142 | _fbmem = L4Re::Util::cap_alloc.alloc<L4Re::Dataspace>(); |
paul@0 | 143 | if (!_fbmem.is_valid()) return 1; |
paul@0 | 144 | |
paul@0 | 145 | descmem = L4Re::Util::cap_alloc.alloc<L4Re::Dataspace>(); |
paul@0 | 146 | if (!descmem.is_valid()) return 1; |
paul@0 | 147 | |
paul@142 | 148 | dma = L4Re::Util::cap_alloc.alloc<L4Re::Dma_space>(); |
paul@142 | 149 | if (!dma.is_valid()) return 1; |
paul@142 | 150 | |
paul@142 | 151 | // Create the DMA space. |
paul@142 | 152 | |
paul@142 | 153 | L4::Cap<L4vbus::Vbus> vbus = L4Re::Env::env()->get_cap<L4vbus::Vbus>("vbus"); |
paul@142 | 154 | if (!vbus.is_valid()) return 1; |
paul@142 | 155 | |
paul@142 | 156 | if (l4_error(L4Re::Env::env()->user_factory()->create(dma))) |
paul@142 | 157 | return 1; |
paul@142 | 158 | |
paul@142 | 159 | l4vbus_device_handle_t device = L4VBUS_NULL; |
paul@142 | 160 | l4vbus_resource_t dma_resource; |
paul@142 | 161 | |
paul@142 | 162 | if (!find_resource(&device, &dma_resource, L4VBUS_RESOURCE_DMA_DOMAIN)) |
paul@142 | 163 | return 1; |
paul@142 | 164 | |
paul@142 | 165 | if (vbus->assign_dma_domain(dma_resource.start, |
paul@142 | 166 | L4VBUS_DMAD_BIND | L4VBUS_DMAD_L4RE_DMA_SPACE, |
paul@142 | 167 | dma)) |
paul@142 | 168 | return 1; |
paul@142 | 169 | |
paul@0 | 170 | // Obtain the memory requirements. |
paul@0 | 171 | |
paul@0 | 172 | Lcd_jz4740_chip *chip = static_cast<Lcd_jz4740_chip *>(_chip); |
paul@0 | 173 | |
paul@0 | 174 | fb_size = chip->get_screen_size(); |
paul@0 | 175 | desc_size = chip->get_descriptors_size(); |
paul@0 | 176 | |
paul@0 | 177 | // Allocate memory for the framebuffer at 2**6 == 64 byte == 16 word alignment, |
paul@0 | 178 | // also for the descriptors. |
paul@82 | 179 | // NOTE: A 64 word burst mode is available on the JZ4780 that would |
paul@82 | 180 | // NOTE: necessitate 64 word alignment for the framebuffer. |
paul@0 | 181 | |
paul@0 | 182 | const l4_size_t alloc_flags = L4Re::Mem_alloc::Continuous | L4Re::Mem_alloc::Pinned; |
paul@0 | 183 | |
paul@82 | 184 | if (L4Re::Env::env()->mem_alloc()->alloc(fb_size, _fbmem, alloc_flags, 8) || |
paul@0 | 185 | L4Re::Env::env()->mem_alloc()->alloc(desc_size, descmem, alloc_flags, 6)) |
paul@0 | 186 | return 1; |
paul@0 | 187 | |
paul@0 | 188 | // Map the allocated memory, obtaining virtual addresses. |
paul@0 | 189 | |
paul@142 | 190 | const L4Re::Rm::F::Flags flags = L4Re::Rm::F::Search_addr | |
paul@142 | 191 | L4Re::Rm::F::Eager_map | |
paul@142 | 192 | L4Re::Rm::F::RW; |
paul@0 | 193 | |
paul@0 | 194 | fb_vaddr = 0; |
paul@0 | 195 | desc_vaddr = 0; |
paul@0 | 196 | |
paul@142 | 197 | if (L4Re::Env::env()->rm()->attach(&fb_vaddr, fb_size, flags, _fbmem, 0) || |
paul@142 | 198 | L4Re::Env::env()->rm()->attach(&desc_vaddr, desc_size, flags, descmem, 0)) |
paul@0 | 199 | return 1; |
paul@0 | 200 | |
paul@0 | 201 | // Obtain physical addresses for the framebuffer and descriptors. |
paul@0 | 202 | |
paul@0 | 203 | fb_paddr = 0; |
paul@0 | 204 | desc_paddr = 0; |
paul@0 | 205 | |
paul@0 | 206 | fb_size_out = fb_size; |
paul@0 | 207 | desc_size_out = desc_size; |
paul@0 | 208 | |
paul@142 | 209 | if (dma->map(L4::Ipc::make_cap_rw(_fbmem), 0, &fb_size_out, |
paul@142 | 210 | L4Re::Dma_space::Attributes::None, |
paul@142 | 211 | L4Re::Dma_space::Direction::To_device, |
paul@142 | 212 | &fb_paddr)) |
paul@142 | 213 | return 1; |
paul@142 | 214 | |
paul@142 | 215 | if (dma->map(L4::Ipc::make_cap_rw(descmem), 0, &desc_size_out, |
paul@142 | 216 | L4Re::Dma_space::Attributes::None, |
paul@142 | 217 | L4Re::Dma_space::Direction::To_device, |
paul@142 | 218 | &desc_paddr)) |
paul@0 | 219 | return 1; |
paul@0 | 220 | |
paul@0 | 221 | // Test the mapped region sizes. |
paul@0 | 222 | |
paul@0 | 223 | if ((fb_size_out != fb_size) || (desc_size_out != desc_size)) |
paul@0 | 224 | return 1; |
paul@0 | 225 | |
paul@0 | 226 | return 0; |
paul@0 | 227 | } |
paul@0 | 228 | |
paul@0 | 229 | // Populate a view information structure. |
paul@0 | 230 | |
paul@0 | 231 | void |
paul@0 | 232 | Lcd_jz4740_device::get_view_info(l4re_video_view_info_t *view_info) |
paul@0 | 233 | { |
paul@0 | 234 | // Populate the L4Re framebuffer description with details from the |
paul@0 | 235 | // somewhat similar panel description. |
paul@0 | 236 | |
paul@0 | 237 | Lcd_jz4740_chip *chip = static_cast<Lcd_jz4740_chip *>(_chip); |
paul@0 | 238 | struct Jz4740_lcd_panel *panel = chip->get_panel(); |
paul@0 | 239 | |
paul@0 | 240 | view_info->width = panel->width; |
paul@0 | 241 | view_info->height = panel->height; |
paul@0 | 242 | view_info->pixel_info.bytes_per_pixel = (panel->bpp + 7) / 8; |
paul@0 | 243 | view_info->bytes_per_line = chip->get_line_size(); |
paul@0 | 244 | |
paul@0 | 245 | switch (panel->bpp) |
paul@0 | 246 | { |
paul@82 | 247 | // NOTE: 24bpp here is actually RGBA or RGB padded. |
paul@82 | 248 | |
paul@82 | 249 | case 24: |
paul@82 | 250 | view_info->pixel_info.bytes_per_pixel = 4; |
paul@82 | 251 | view_info->pixel_info.r.shift = 16; view_info->pixel_info.r.size = 8; |
paul@82 | 252 | view_info->pixel_info.g.shift = 8; view_info->pixel_info.g.size = 8; |
paul@82 | 253 | view_info->pixel_info.b.shift = 0; view_info->pixel_info.b.size = 8; |
paul@82 | 254 | break; |
paul@82 | 255 | |
paul@0 | 256 | case 32: |
paul@0 | 257 | view_info->pixel_info.r.shift = 16; view_info->pixel_info.r.size = 8; |
paul@0 | 258 | view_info->pixel_info.g.shift = 8; view_info->pixel_info.g.size = 8; |
paul@0 | 259 | view_info->pixel_info.b.shift = 0; view_info->pixel_info.b.size = 8; |
paul@0 | 260 | break; |
paul@0 | 261 | |
paul@0 | 262 | case 8: |
paul@0 | 263 | view_info->pixel_info.r.shift = 5; view_info->pixel_info.r.size = 3; |
paul@0 | 264 | view_info->pixel_info.g.shift = 2; view_info->pixel_info.g.size = 3; |
paul@0 | 265 | view_info->pixel_info.b.shift = 0; view_info->pixel_info.b.size = 2; |
paul@0 | 266 | break; |
paul@0 | 267 | |
paul@0 | 268 | case 4: |
paul@0 | 269 | view_info->pixel_info.r.shift = 3; view_info->pixel_info.r.size = 1; |
paul@0 | 270 | view_info->pixel_info.g.shift = 1; view_info->pixel_info.g.size = 2; |
paul@0 | 271 | view_info->pixel_info.b.shift = 0; view_info->pixel_info.b.size = 1; |
paul@0 | 272 | break; |
paul@0 | 273 | |
paul@0 | 274 | case 16: |
paul@0 | 275 | default: |
paul@0 | 276 | view_info->pixel_info.r.shift = 11; view_info->pixel_info.r.size = 5; |
paul@0 | 277 | view_info->pixel_info.g.shift = 5; view_info->pixel_info.g.size = 6; |
paul@0 | 278 | view_info->pixel_info.b.shift = 0; view_info->pixel_info.b.size = 5; |
paul@0 | 279 | break; |
paul@0 | 280 | } |
paul@0 | 281 | |
paul@0 | 282 | view_info->pixel_info.a.shift = 0; |
paul@0 | 283 | view_info->pixel_info.a.size = 0; |
paul@0 | 284 | } |
paul@0 | 285 | |
paul@0 | 286 | // Access to peripheral memory. |
paul@0 | 287 | |
paul@0 | 288 | static int setup_memory() |
paul@0 | 289 | { |
paul@82 | 290 | bool is_jz4780 = false; |
paul@82 | 291 | |
paul@0 | 292 | if (get_memory("jz4740-lcd", &lcd_virt_base, &lcd_virt_base_end)) |
paul@82 | 293 | { |
paul@82 | 294 | if (get_memory("jz4780-lcd", &lcd_virt_base, &lcd_virt_base_end)) |
paul@82 | 295 | return 1; |
paul@82 | 296 | else |
paul@82 | 297 | is_jz4780 = true; |
paul@82 | 298 | } |
paul@0 | 299 | |
paul@24 | 300 | // Obtain access to the CPM and display devices. |
paul@0 | 301 | |
paul@0 | 302 | cpm_device = L4Re::Env::env()->get_cap<Cpm_device_interface>("cpm"); |
paul@0 | 303 | if (!cpm_device.is_valid()) return 1; |
paul@0 | 304 | |
paul@0 | 305 | display_device = L4Re::Env::env()->get_cap<Display_device_interface>("display"); |
paul@0 | 306 | if (!display_device.is_valid()) return 1; |
paul@0 | 307 | |
paul@39 | 308 | // Load the panel data from the configured library. |
paul@0 | 309 | |
paul@39 | 310 | struct Jz4740_lcd_panel *panel = (struct Jz4740_lcd_panel *) load_panel(); |
paul@0 | 311 | |
paul@0 | 312 | // Initialise the LCD abstraction. |
paul@0 | 313 | |
paul@82 | 314 | if (is_jz4780) |
paul@82 | 315 | lcd_chip = new Lcd_jz4780_chip(lcd_virt_base, panel); |
paul@82 | 316 | else |
paul@82 | 317 | lcd_chip = new Lcd_jz4740_chip(lcd_virt_base, panel); |
paul@0 | 318 | |
paul@0 | 319 | return 0; |
paul@0 | 320 | } |
paul@0 | 321 | |
paul@0 | 322 | // Device initialisation. |
paul@0 | 323 | |
paul@0 | 324 | Lcd_jz4740_device *Lcd_jz4740_device::device = 0; |
paul@0 | 325 | |
paul@0 | 326 | Lcd_device *Lcd_device::get_device() |
paul@0 | 327 | { |
paul@0 | 328 | if (Lcd_jz4740_device::device) return Lcd_jz4740_device::device; |
paul@0 | 329 | |
paul@0 | 330 | if (setup_memory()) return 0; |
paul@0 | 331 | |
paul@0 | 332 | // Initialise the common device. |
paul@0 | 333 | |
paul@0 | 334 | Lcd_jz4740_device::device = new Lcd_jz4740_device(lcd_chip, display_device); |
paul@0 | 335 | |
paul@0 | 336 | return Lcd_jz4740_device::device; |
paul@0 | 337 | } |