1 /* 2 * arch/arm/mach-mv78xx0/common.c 3 * 4 * Core functions for Marvell MV78xx0 SoCs 5 * 6 * This file is licensed under the terms of the GNU General Public 7 * License version 2. This program is licensed "as is" without any 8 * warranty of any kind, whether express or implied. 9 */ 10 11 #include <linux/kernel.h> 12 #include <linux/init.h> 13 #include <linux/platform_device.h> 14 #include <linux/serial_8250.h> 15 #include <linux/ata_platform.h> 16 #include <linux/clk-provider.h> 17 #include <linux/ethtool.h> 18 #include <asm/hardware/cache-feroceon-l2.h> 19 #include <asm/mach/map.h> 20 #include <asm/mach/time.h> 21 #include <linux/platform_data/usb-ehci-orion.h> 22 #include <linux/platform_data/mtd-orion_nand.h> 23 #include <plat/time.h> 24 #include <plat/common.h> 25 #include <plat/addr-map.h> 26 #include "mv78xx0.h" 27 #include "bridge-regs.h" 28 #include "common.h" 29 30 static int get_tclk(void); 31 32 /***************************************************************************** 33 * Common bits 34 ****************************************************************************/ 35 int mv78xx0_core_index(void) 36 { 37 u32 extra; 38 39 /* 40 * Read Extra Features register. 41 */ 42 __asm__("mrc p15, 1, %0, c15, c1, 0" : "=r" (extra)); 43 44 return !!(extra & 0x00004000); 45 } 46 47 static int get_hclk(void) 48 { 49 int hclk; 50 51 /* 52 * HCLK tick rate is configured by DEV_D[7:5] pins. 53 */ 54 switch ((readl(SAMPLE_AT_RESET_LOW) >> 5) & 7) { 55 case 0: 56 hclk = 166666667; 57 break; 58 case 1: 59 hclk = 200000000; 60 break; 61 case 2: 62 hclk = 266666667; 63 break; 64 case 3: 65 hclk = 333333333; 66 break; 67 case 4: 68 hclk = 400000000; 69 break; 70 default: 71 panic("unknown HCLK PLL setting: %.8x\n", 72 readl(SAMPLE_AT_RESET_LOW)); 73 } 74 75 return hclk; 76 } 77 78 static void get_pclk_l2clk(int hclk, int core_index, int *pclk, int *l2clk) 79 { 80 u32 cfg; 81 82 /* 83 * Core #0 PCLK/L2CLK is configured by bits [13:8], core #1 84 * PCLK/L2CLK by bits [19:14]. 85 */ 86 if (core_index == 0) { 87 cfg = (readl(SAMPLE_AT_RESET_LOW) >> 8) & 0x3f; 88 } else { 89 cfg = (readl(SAMPLE_AT_RESET_LOW) >> 14) & 0x3f; 90 } 91 92 /* 93 * Bits [11:8] ([17:14] for core #1) configure the PCLK:HCLK 94 * ratio (1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6). 95 */ 96 *pclk = ((u64)hclk * (2 + (cfg & 0xf))) >> 1; 97 98 /* 99 * Bits [13:12] ([19:18] for core #1) configure the PCLK:L2CLK 100 * ratio (1, 2, 3). 101 */ 102 *l2clk = *pclk / (((cfg >> 4) & 3) + 1); 103 } 104 105 static int get_tclk(void) 106 { 107 int tclk_freq; 108 109 /* 110 * TCLK tick rate is configured by DEV_A[2:0] strap pins. 111 */ 112 switch ((readl(SAMPLE_AT_RESET_HIGH) >> 6) & 7) { 113 case 1: 114 tclk_freq = 166666667; 115 break; 116 case 3: 117 tclk_freq = 200000000; 118 break; 119 default: 120 panic("unknown TCLK PLL setting: %.8x\n", 121 readl(SAMPLE_AT_RESET_HIGH)); 122 } 123 124 return tclk_freq; 125 } 126 127 128 /***************************************************************************** 129 * I/O Address Mapping 130 ****************************************************************************/ 131 static struct map_desc mv78xx0_io_desc[] __initdata = { 132 { 133 .virtual = (unsigned long) MV78XX0_CORE_REGS_VIRT_BASE, 134 .pfn = 0, 135 .length = MV78XX0_CORE_REGS_SIZE, 136 .type = MT_DEVICE, 137 }, { 138 .virtual = (unsigned long) MV78XX0_REGS_VIRT_BASE, 139 .pfn = __phys_to_pfn(MV78XX0_REGS_PHYS_BASE), 140 .length = MV78XX0_REGS_SIZE, 141 .type = MT_DEVICE, 142 }, 143 }; 144 145 void __init mv78xx0_map_io(void) 146 { 147 unsigned long phys; 148 149 /* 150 * Map the right set of per-core registers depending on 151 * which core we are running on. 152 */ 153 if (mv78xx0_core_index() == 0) { 154 phys = MV78XX0_CORE0_REGS_PHYS_BASE; 155 } else { 156 phys = MV78XX0_CORE1_REGS_PHYS_BASE; 157 } 158 mv78xx0_io_desc[0].pfn = __phys_to_pfn(phys); 159 160 iotable_init(mv78xx0_io_desc, ARRAY_SIZE(mv78xx0_io_desc)); 161 } 162 163 164 /***************************************************************************** 165 * CLK tree 166 ****************************************************************************/ 167 static struct clk *tclk; 168 169 static void __init clk_init(void) 170 { 171 tclk = clk_register_fixed_rate(NULL, "tclk", NULL, 0, get_tclk()); 172 173 orion_clkdev_init(tclk); 174 } 175 176 /***************************************************************************** 177 * EHCI 178 ****************************************************************************/ 179 void __init mv78xx0_ehci0_init(void) 180 { 181 orion_ehci_init(USB0_PHYS_BASE, IRQ_MV78XX0_USB_0, EHCI_PHY_NA); 182 } 183 184 185 /***************************************************************************** 186 * EHCI1 187 ****************************************************************************/ 188 void __init mv78xx0_ehci1_init(void) 189 { 190 orion_ehci_1_init(USB1_PHYS_BASE, IRQ_MV78XX0_USB_1); 191 } 192 193 194 /***************************************************************************** 195 * EHCI2 196 ****************************************************************************/ 197 void __init mv78xx0_ehci2_init(void) 198 { 199 orion_ehci_2_init(USB2_PHYS_BASE, IRQ_MV78XX0_USB_2); 200 } 201 202 203 /***************************************************************************** 204 * GE00 205 ****************************************************************************/ 206 void __init mv78xx0_ge00_init(struct mv643xx_eth_platform_data *eth_data) 207 { 208 orion_ge00_init(eth_data, 209 GE00_PHYS_BASE, IRQ_MV78XX0_GE00_SUM, 210 IRQ_MV78XX0_GE_ERR, 211 MV643XX_TX_CSUM_DEFAULT_LIMIT); 212 } 213 214 215 /***************************************************************************** 216 * GE01 217 ****************************************************************************/ 218 void __init mv78xx0_ge01_init(struct mv643xx_eth_platform_data *eth_data) 219 { 220 orion_ge01_init(eth_data, 221 GE01_PHYS_BASE, IRQ_MV78XX0_GE01_SUM, 222 NO_IRQ, 223 MV643XX_TX_CSUM_DEFAULT_LIMIT); 224 } 225 226 227 /***************************************************************************** 228 * GE10 229 ****************************************************************************/ 230 void __init mv78xx0_ge10_init(struct mv643xx_eth_platform_data *eth_data) 231 { 232 u32 dev, rev; 233 234 /* 235 * On the Z0, ge10 and ge11 are internally connected back 236 * to back, and not brought out. 237 */ 238 mv78xx0_pcie_id(&dev, &rev); 239 if (dev == MV78X00_Z0_DEV_ID) { 240 eth_data->phy_addr = MV643XX_ETH_PHY_NONE; 241 eth_data->speed = SPEED_1000; 242 eth_data->duplex = DUPLEX_FULL; 243 } 244 245 orion_ge10_init(eth_data, 246 GE10_PHYS_BASE, IRQ_MV78XX0_GE10_SUM, 247 NO_IRQ); 248 } 249 250 251 /***************************************************************************** 252 * GE11 253 ****************************************************************************/ 254 void __init mv78xx0_ge11_init(struct mv643xx_eth_platform_data *eth_data) 255 { 256 u32 dev, rev; 257 258 /* 259 * On the Z0, ge10 and ge11 are internally connected back 260 * to back, and not brought out. 261 */ 262 mv78xx0_pcie_id(&dev, &rev); 263 if (dev == MV78X00_Z0_DEV_ID) { 264 eth_data->phy_addr = MV643XX_ETH_PHY_NONE; 265 eth_data->speed = SPEED_1000; 266 eth_data->duplex = DUPLEX_FULL; 267 } 268 269 orion_ge11_init(eth_data, 270 GE11_PHYS_BASE, IRQ_MV78XX0_GE11_SUM, 271 NO_IRQ); 272 } 273 274 /***************************************************************************** 275 * I2C 276 ****************************************************************************/ 277 void __init mv78xx0_i2c_init(void) 278 { 279 orion_i2c_init(I2C_0_PHYS_BASE, IRQ_MV78XX0_I2C_0, 8); 280 orion_i2c_1_init(I2C_1_PHYS_BASE, IRQ_MV78XX0_I2C_1, 8); 281 } 282 283 /***************************************************************************** 284 * SATA 285 ****************************************************************************/ 286 void __init mv78xx0_sata_init(struct mv_sata_platform_data *sata_data) 287 { 288 orion_sata_init(sata_data, SATA_PHYS_BASE, IRQ_MV78XX0_SATA); 289 } 290 291 292 /***************************************************************************** 293 * UART0 294 ****************************************************************************/ 295 void __init mv78xx0_uart0_init(void) 296 { 297 orion_uart0_init(UART0_VIRT_BASE, UART0_PHYS_BASE, 298 IRQ_MV78XX0_UART_0, tclk); 299 } 300 301 302 /***************************************************************************** 303 * UART1 304 ****************************************************************************/ 305 void __init mv78xx0_uart1_init(void) 306 { 307 orion_uart1_init(UART1_VIRT_BASE, UART1_PHYS_BASE, 308 IRQ_MV78XX0_UART_1, tclk); 309 } 310 311 312 /***************************************************************************** 313 * UART2 314 ****************************************************************************/ 315 void __init mv78xx0_uart2_init(void) 316 { 317 orion_uart2_init(UART2_VIRT_BASE, UART2_PHYS_BASE, 318 IRQ_MV78XX0_UART_2, tclk); 319 } 320 321 /***************************************************************************** 322 * UART3 323 ****************************************************************************/ 324 void __init mv78xx0_uart3_init(void) 325 { 326 orion_uart3_init(UART3_VIRT_BASE, UART3_PHYS_BASE, 327 IRQ_MV78XX0_UART_3, tclk); 328 } 329 330 /***************************************************************************** 331 * Time handling 332 ****************************************************************************/ 333 void __init mv78xx0_init_early(void) 334 { 335 orion_time_set_base(TIMER_VIRT_BASE); 336 if (mv78xx0_core_index() == 0) 337 mvebu_mbus_init("marvell,mv78xx0-mbus", 338 BRIDGE_WINS_CPU0_BASE, BRIDGE_WINS_SZ, 339 DDR_WINDOW_CPU0_BASE, DDR_WINDOW_CPU_SZ); 340 else 341 mvebu_mbus_init("marvell,mv78xx0-mbus", 342 BRIDGE_WINS_CPU1_BASE, BRIDGE_WINS_SZ, 343 DDR_WINDOW_CPU1_BASE, DDR_WINDOW_CPU_SZ); 344 } 345 346 void __init_refok mv78xx0_timer_init(void) 347 { 348 orion_time_init(BRIDGE_VIRT_BASE, BRIDGE_INT_TIMER1_CLR, 349 IRQ_MV78XX0_TIMER_1, get_tclk()); 350 } 351 352 353 /***************************************************************************** 354 * General 355 ****************************************************************************/ 356 static char * __init mv78xx0_id(void) 357 { 358 u32 dev, rev; 359 360 mv78xx0_pcie_id(&dev, &rev); 361 362 if (dev == MV78X00_Z0_DEV_ID) { 363 if (rev == MV78X00_REV_Z0) 364 return "MV78X00-Z0"; 365 else 366 return "MV78X00-Rev-Unsupported"; 367 } else if (dev == MV78100_DEV_ID) { 368 if (rev == MV78100_REV_A0) 369 return "MV78100-A0"; 370 else if (rev == MV78100_REV_A1) 371 return "MV78100-A1"; 372 else 373 return "MV78100-Rev-Unsupported"; 374 } else if (dev == MV78200_DEV_ID) { 375 if (rev == MV78100_REV_A0) 376 return "MV78200-A0"; 377 else 378 return "MV78200-Rev-Unsupported"; 379 } else { 380 return "Device-Unknown"; 381 } 382 } 383 384 static int __init is_l2_writethrough(void) 385 { 386 return !!(readl(CPU_CONTROL) & L2_WRITETHROUGH); 387 } 388 389 void __init mv78xx0_init(void) 390 { 391 int core_index; 392 int hclk; 393 int pclk; 394 int l2clk; 395 396 core_index = mv78xx0_core_index(); 397 hclk = get_hclk(); 398 get_pclk_l2clk(hclk, core_index, &pclk, &l2clk); 399 400 printk(KERN_INFO "%s ", mv78xx0_id()); 401 printk("core #%d, ", core_index); 402 printk("PCLK = %dMHz, ", (pclk + 499999) / 1000000); 403 printk("L2 = %dMHz, ", (l2clk + 499999) / 1000000); 404 printk("HCLK = %dMHz, ", (hclk + 499999) / 1000000); 405 printk("TCLK = %dMHz\n", (get_tclk() + 499999) / 1000000); 406 407 if (IS_ENABLED(CONFIG_CACHE_FEROCEON_L2)) 408 feroceon_l2_init(is_l2_writethrough()); 409 410 /* Setup root of clk tree */ 411 clk_init(); 412 } 413 414 void mv78xx0_restart(enum reboot_mode mode, const char *cmd) 415 { 416 /* 417 * Enable soft reset to assert RSTOUTn. 418 */ 419 writel(SOFT_RESET_OUT_EN, RSTOUTn_MASK); 420 421 /* 422 * Assert soft reset. 423 */ 424 writel(SOFT_RESET, SYSTEM_SOFT_RESET); 425 426 while (1) 427 ; 428 } 429