1 // SPDX-License-Identifier: GPL-2.0+
4 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
5 * Marius Groeger <mgroeger@sysgo.de>
8 * David Mueller, ELSOFT AG, <d.mueller@elsoft.ch>
11 * Texas Instruments, <www.ti.com>
12 * Kshitij Gupta <Kshitij@ti.com>
16 * Philippe Robin, <philippe.robin@arm.com>
20 * Linus Walleij <linus.walleij@linaro.org>
25 #include "integrator-sc.h"
28 #define INTEGRATOR_BOOT_ROM_BASE 0x20000000
29 #define INTEGRATOR_HDR0_SDRAM_BASE 0x80000000
32 * These are in the physical addresses on the CPU side, i.e.
33 * where we read and write stuff - you don't want to try to
36 #define PHYS_PCI_MEM_BASE 0x40000000
37 #define PHYS_PCI_IO_BASE 0x60000000 /* PCI I/O space base */
38 #define PHYS_PCI_CONFIG_BASE 0x61000000
39 #define PHYS_PCI_V3_BASE 0x62000000 /* V360EPC registers */
40 #define SZ_256M 0x10000000
43 * These are in the PCI BUS address space
44 * Set to 0x00000000 in the Linux kernel, 0x40000000 in Boot monitor
45 * we follow the example of the kernel, because that is the address
46 * range that devices actually use - what would they be doing at
49 #define PCI_BUS_NONMEM_START 0x00000000
50 #define PCI_BUS_NONMEM_SIZE SZ_256M
52 #define PCI_BUS_PREMEM_START (PCI_BUS_NONMEM_START + PCI_BUS_NONMEM_SIZE)
53 #define PCI_BUS_PREMEM_SIZE SZ_256M
55 #if PCI_BUS_NONMEM_START & 0x000fffff
56 #error PCI_BUS_NONMEM_START must be megabyte aligned
58 #if PCI_BUS_PREMEM_START & 0x000fffff
59 #error PCI_BUS_PREMEM_START must be megabyte aligned
63 * Initialize PCI Devices, report devices found.
66 #ifndef CONFIG_PCI_PNP
67 #define PCI_ENET0_IOADDR 0x60000000 /* First card in PCI I/O space */
68 #define PCI_ENET0_MEMADDR 0x40000000 /* First card in PCI memory space */
69 static struct pci_config_table pci_integrator_config_table[] = {
70 { PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, 0x0f, PCI_ANY_ID,
71 pci_cfgfunc_config_device, { PCI_ENET0_IOADDR,
73 PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER }},
76 #endif /* CONFIG_PCI_PNP */
78 /* V3 access routines */
79 #define v3_writeb(o, v) __raw_writeb(v, PHYS_PCI_V3_BASE + (unsigned int)(o))
80 #define v3_readb(o) (__raw_readb(PHYS_PCI_V3_BASE + (unsigned int)(o)))
82 #define v3_writew(o, v) __raw_writew(v, PHYS_PCI_V3_BASE + (unsigned int)(o))
83 #define v3_readw(o) (__raw_readw(PHYS_PCI_V3_BASE + (unsigned int)(o)))
85 #define v3_writel(o, v) __raw_writel(v, PHYS_PCI_V3_BASE + (unsigned int)(o))
86 #define v3_readl(o) (__raw_readl(PHYS_PCI_V3_BASE + (unsigned int)(o)))
88 static unsigned long v3_open_config_window(pci_dev_t bdf, int offset)
90 unsigned int address, mapaddress;
91 unsigned int busnr = PCI_BUS(bdf);
92 unsigned int devfn = PCI_FUNC(bdf);
95 * Trap out illegal values
106 * Linux calls the thing U-Boot calls "DEV" "SLOT"
107 * instead, but it's the same 5 bits
109 int slot = PCI_DEV(bdf);
112 * local bus segment so need a type 0 config cycle
114 * build the PCI configuration "address" with one-hot in
118 * 3:1 = config cycle (101)
119 * 0 = PCI A1 & A0 are 0 (0)
121 address = PCI_FUNC(bdf) << 8;
122 mapaddress = V3_LB_MAP_TYPE_CONFIG;
126 * high order bits are handled by the MAP register
128 mapaddress |= 1 << (slot - 5);
131 * low order bits handled directly in the address
133 address |= 1 << (slot + 11);
136 * not the local bus segment so need a type 1 config cycle
140 * 15:11 = slot number (7:3 of devfn)
141 * 10:8 = func number (2:0 of devfn)
144 * 3:1 = config cycle (101)
145 * 0 = PCI A1 & A0 from host bus (1)
147 mapaddress = V3_LB_MAP_TYPE_CONFIG | V3_LB_MAP_AD_LOW_EN;
148 address = (busnr << 16) | (devfn << 8);
152 * Set up base0 to see all 512Mbytes of memory space (not
153 * prefetchable), this frees up base1 for re-use by
154 * configuration memory
156 v3_writel(V3_LB_BASE0, v3_addr_to_lb_base(PHYS_PCI_MEM_BASE) |
157 V3_LB_BASE_ADR_SIZE_512MB | V3_LB_BASE_ENABLE);
160 * Set up base1/map1 to point into configuration space.
162 v3_writel(V3_LB_BASE1, v3_addr_to_lb_base(PHYS_PCI_CONFIG_BASE) |
163 V3_LB_BASE_ADR_SIZE_16MB | V3_LB_BASE_ENABLE);
164 v3_writew(V3_LB_MAP1, mapaddress);
166 return PHYS_PCI_CONFIG_BASE + address + offset;
169 static void v3_close_config_window(void)
172 * Reassign base1 for use by prefetchable PCI memory
174 v3_writel(V3_LB_BASE1, v3_addr_to_lb_base(PHYS_PCI_MEM_BASE + SZ_256M) |
175 V3_LB_BASE_ADR_SIZE_256MB | V3_LB_BASE_PREFETCH |
177 v3_writew(V3_LB_MAP1, v3_addr_to_lb_map(PCI_BUS_PREMEM_START) |
178 V3_LB_MAP_TYPE_MEM_MULTIPLE);
181 * And shrink base0 back to a 256M window (NOTE: MAP0 already correct)
183 v3_writel(V3_LB_BASE0, v3_addr_to_lb_base(PHYS_PCI_MEM_BASE) |
184 V3_LB_BASE_ADR_SIZE_256MB | V3_LB_BASE_ENABLE);
187 static int pci_integrator_read_byte(struct pci_controller *hose, pci_dev_t bdf,
188 int offset, unsigned char *val)
192 addr = v3_open_config_window(bdf, offset);
193 *val = __raw_readb(addr);
194 v3_close_config_window();
198 static int pci_integrator_read__word(struct pci_controller *hose,
199 pci_dev_t bdf, int offset,
204 addr = v3_open_config_window(bdf, offset);
205 *val = __raw_readw(addr);
206 v3_close_config_window();
210 static int pci_integrator_read_dword(struct pci_controller *hose,
211 pci_dev_t bdf, int offset,
216 addr = v3_open_config_window(bdf, offset);
217 *val = __raw_readl(addr);
218 v3_close_config_window();
222 static int pci_integrator_write_byte(struct pci_controller *hose,
223 pci_dev_t bdf, int offset,
228 addr = v3_open_config_window(bdf, offset);
229 __raw_writeb((u8)val, addr);
231 v3_close_config_window();
235 static int pci_integrator_write_word(struct pci_controller *hose,
236 pci_dev_t bdf, int offset,
241 addr = v3_open_config_window(bdf, offset);
242 __raw_writew((u8)val, addr);
244 v3_close_config_window();
248 static int pci_integrator_write_dword(struct pci_controller *hose,
249 pci_dev_t bdf, int offset,
254 addr = v3_open_config_window(bdf, offset);
255 __raw_writel((u8)val, addr);
257 v3_close_config_window();
261 struct pci_controller integrator_hose = {
262 #ifndef CONFIG_PCI_PNP
263 config_table: pci_integrator_config_table,
267 void pci_init_board(void)
269 struct pci_controller *hose = &integrator_hose;
272 /* setting this register will take the V3 out of reset */
273 __raw_writel(SC_PCI_PCIEN, SC_PCI);
275 /* Wait for 230 ms (from spec) before accessing any V3 registers */
278 /* Now write the Base I/O Address Word to PHYS_PCI_V3_BASE + 0x6E */
279 v3_writew(V3_LB_IO_BASE, (PHYS_PCI_V3_BASE >> 16));
281 /* Wait for the mailbox to settle */
283 v3_writeb(V3_MAIL_DATA, 0xAA);
284 v3_writeb(V3_MAIL_DATA + 4, 0x55);
285 } while (v3_readb(V3_MAIL_DATA) != 0xAA ||
286 v3_readb(V3_MAIL_DATA + 4) != 0x55);
288 /* Make sure that V3 register access is not locked, if it is, unlock it */
289 if (v3_readw(V3_SYSTEM) & V3_SYSTEM_M_LOCK)
290 v3_writew(V3_SYSTEM, 0xA05F);
293 * Ensure that the slave accesses from PCI are disabled while we
294 * setup memory windows
296 val = v3_readw(V3_PCI_CMD);
297 val &= ~(V3_COMMAND_M_MEM_EN | V3_COMMAND_M_IO_EN);
298 v3_writew(V3_PCI_CMD, val);
300 /* Clear RST_OUT to 0; keep the PCI bus in reset until we've finished */
301 val = v3_readw(V3_SYSTEM);
302 val &= ~V3_SYSTEM_M_RST_OUT;
303 v3_writew(V3_SYSTEM, val);
305 /* Make all accesses from PCI space retry until we're ready for them */
306 val = v3_readw(V3_PCI_CFG);
307 val |= V3_PCI_CFG_M_RETRY_EN;
308 v3_writew(V3_PCI_CFG, val);
311 * Set up any V3 PCI Configuration Registers that we absolutely have to.
312 * LB_CFG controls Local Bus protocol.
313 * Enable LocalBus byte strobes for READ accesses too.
314 * set bit 7 BE_IMODE and bit 6 BE_OMODE
316 val = v3_readw(V3_LB_CFG);
318 v3_writew(V3_LB_CFG, val);
320 /* PCI_CMD controls overall PCI operation. Enable PCI bus master. */
321 val = v3_readw(V3_PCI_CMD);
322 val |= V3_COMMAND_M_MASTER_EN;
323 v3_writew(V3_PCI_CMD, val);
326 * PCI_MAP0 controls where the PCI to CPU memory window is on
329 v3_writel(V3_PCI_MAP0,
330 (INTEGRATOR_BOOT_ROM_BASE) | (V3_PCI_MAP_M_ADR_SIZE_512MB |
331 V3_PCI_MAP_M_REG_EN |
332 V3_PCI_MAP_M_ENABLE));
334 /* PCI_BASE0 is the PCI address of the start of the window */
335 v3_writel(V3_PCI_BASE0, INTEGRATOR_BOOT_ROM_BASE);
337 /* PCI_MAP1 is LOCAL address of the start of the window */
338 v3_writel(V3_PCI_MAP1,
339 (INTEGRATOR_HDR0_SDRAM_BASE) | (V3_PCI_MAP_M_ADR_SIZE_1GB |
340 V3_PCI_MAP_M_REG_EN |
341 V3_PCI_MAP_M_ENABLE));
343 /* PCI_BASE1 is the PCI address of the start of the window */
344 v3_writel(V3_PCI_BASE1, INTEGRATOR_HDR0_SDRAM_BASE);
347 * Set up memory the windows from local bus memory into PCI
348 * configuration, I/O and Memory regions.
349 * PCI I/O, LB_BASE2 and LB_MAP2 are used exclusively for this.
351 v3_writew(V3_LB_BASE2,
352 v3_addr_to_lb_map(PHYS_PCI_IO_BASE) | V3_LB_BASE_ENABLE);
353 v3_writew(V3_LB_MAP2, 0);
355 /* PCI Configuration, use LB_BASE1/LB_MAP1. */
358 * PCI Memory use LB_BASE0/LB_MAP0 and LB_BASE1/LB_MAP1
359 * Map first 256Mbytes as non-prefetchable via BASE0/MAP0
361 v3_writel(V3_LB_BASE0, v3_addr_to_lb_base(PHYS_PCI_MEM_BASE) |
362 V3_LB_BASE_ADR_SIZE_256MB | V3_LB_BASE_ENABLE);
363 v3_writew(V3_LB_MAP0,
364 v3_addr_to_lb_map(PCI_BUS_NONMEM_START) | V3_LB_MAP_TYPE_MEM);
366 /* Map second 256 Mbytes as prefetchable via BASE1/MAP1 */
367 v3_writel(V3_LB_BASE1, v3_addr_to_lb_base(PHYS_PCI_MEM_BASE + SZ_256M) |
368 V3_LB_BASE_ADR_SIZE_256MB | V3_LB_BASE_PREFETCH |
370 v3_writew(V3_LB_MAP1, v3_addr_to_lb_map(PCI_BUS_PREMEM_START) |
371 V3_LB_MAP_TYPE_MEM_MULTIPLE);
373 /* Dump PCI to local address space mappings */
374 debug("LB_BASE0 = %08x\n", v3_readl(V3_LB_BASE0));
375 debug("LB_MAP0 = %04x\n", v3_readw(V3_LB_MAP0));
376 debug("LB_BASE1 = %08x\n", v3_readl(V3_LB_BASE1));
377 debug("LB_MAP1 = %04x\n", v3_readw(V3_LB_MAP1));
378 debug("LB_BASE2 = %04x\n", v3_readw(V3_LB_BASE2));
379 debug("LB_MAP2 = %04x\n", v3_readw(V3_LB_MAP2));
380 debug("LB_IO_BASE = %04x\n", v3_readw(V3_LB_IO_BASE));
383 * Allow accesses to PCI Configuration space and set up A1, A0 for
384 * type 1 config cycles
386 val = v3_readw(V3_PCI_CFG);
387 val &= ~(V3_PCI_CFG_M_RETRY_EN | V3_PCI_CFG_M_AD_LOW1);
388 val |= V3_PCI_CFG_M_AD_LOW0;
389 v3_writew(V3_PCI_CFG, val);
391 /* now we can allow incoming PCI MEMORY accesses */
392 val = v3_readw(V3_PCI_CMD);
393 val |= V3_COMMAND_M_MEM_EN;
394 v3_writew(V3_PCI_CMD, val);
397 * Set RST_OUT to take the PCI bus is out of reset, PCI devices can
400 val = v3_readw(V3_SYSTEM);
401 val |= V3_SYSTEM_M_RST_OUT;
402 v3_writew(V3_SYSTEM, val);
404 /* Lock the V3 system register so that no one else can play with it */
405 val = v3_readw(V3_SYSTEM);
406 val |= V3_SYSTEM_M_LOCK;
407 v3_writew(V3_SYSTEM, val);
410 * Configure and register the PCI hose
412 hose->first_busno = 0;
413 hose->last_busno = 0xff;
415 /* System memory space, window 0 256 MB non-prefetchable */
416 pci_set_region(hose->regions + 0,
417 PCI_BUS_NONMEM_START, PHYS_PCI_MEM_BASE,
421 /* System memory space, window 1 256 MB prefetchable */
422 pci_set_region(hose->regions + 1,
423 PCI_BUS_PREMEM_START, PHYS_PCI_MEM_BASE + SZ_256M,
426 PCI_REGION_PREFETCH);
429 pci_set_region(hose->regions + 2,
430 0x00000000, PHYS_PCI_IO_BASE, 0x01000000,
433 /* PCI Memory - config space */
434 pci_set_region(hose->regions + 3,
435 0x00000000, PHYS_PCI_CONFIG_BASE, 0x01000000,
438 pci_set_region(hose->regions + 4,
439 0x00000000, PHYS_PCI_V3_BASE, 0x01000000,
442 hose->region_count = 5;
445 pci_integrator_read_byte,
446 pci_integrator_read__word,
447 pci_integrator_read_dword,
448 pci_integrator_write_byte,
449 pci_integrator_write_word,
450 pci_integrator_write_dword);
452 pci_register_hose(hose);
454 pciauto_config_init(hose);
455 pciauto_config_device(hose, 0);
457 hose->last_busno = pci_hose_scan(hose);