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1da177e4 LT |
1 | /* |
2 | * arch/ppc/platforms/spruce.c | |
3 | * | |
4 | * Board and PCI setup routines for IBM Spruce | |
5 | * | |
6 | * Author: MontaVista Software <source@mvista.com> | |
7 | * | |
8 | * 2000-2004 (c) MontaVista, Software, Inc. This file is licensed under | |
9 | * the terms of the GNU General Public License version 2. This program | |
10 | * is licensed "as is" without any warranty of any kind, whether express | |
11 | * or implied. | |
12 | */ | |
13 | ||
14 | #include <linux/config.h> | |
15 | #include <linux/stddef.h> | |
16 | #include <linux/kernel.h> | |
17 | #include <linux/init.h> | |
18 | #include <linux/errno.h> | |
19 | #include <linux/reboot.h> | |
20 | #include <linux/pci.h> | |
21 | #include <linux/kdev_t.h> | |
22 | #include <linux/types.h> | |
23 | #include <linux/major.h> | |
24 | #include <linux/initrd.h> | |
25 | #include <linux/console.h> | |
26 | #include <linux/delay.h> | |
27 | #include <linux/seq_file.h> | |
28 | #include <linux/ide.h> | |
29 | #include <linux/root_dev.h> | |
30 | #include <linux/serial.h> | |
31 | #include <linux/tty.h> | |
32 | #include <linux/serial_core.h> | |
33 | ||
34 | #include <asm/system.h> | |
35 | #include <asm/pgtable.h> | |
36 | #include <asm/page.h> | |
37 | #include <asm/dma.h> | |
38 | #include <asm/io.h> | |
39 | #include <asm/machdep.h> | |
40 | #include <asm/time.h> | |
41 | #include <asm/todc.h> | |
42 | #include <asm/bootinfo.h> | |
43 | #include <asm/kgdb.h> | |
44 | ||
45 | #include <syslib/cpc700.h> | |
46 | ||
47 | #include "spruce.h" | |
48 | ||
49 | static inline int | |
50 | spruce_map_irq(struct pci_dev *dev, unsigned char idsel, unsigned char pin) | |
51 | { | |
52 | static char pci_irq_table[][4] = | |
53 | /* | |
54 | * PCI IDSEL/INTPIN->INTLINE | |
55 | * A B C D | |
56 | */ | |
57 | { | |
58 | {23, 24, 25, 26}, /* IDSEL 1 - PCI slot 3 */ | |
59 | {24, 25, 26, 23}, /* IDSEL 2 - PCI slot 2 */ | |
60 | {25, 26, 23, 24}, /* IDSEL 3 - PCI slot 1 */ | |
61 | {26, 23, 24, 25}, /* IDSEL 4 - PCI slot 0 */ | |
62 | }; | |
63 | ||
64 | const long min_idsel = 1, max_idsel = 4, irqs_per_slot = 4; | |
65 | return PCI_IRQ_TABLE_LOOKUP; | |
66 | } | |
67 | ||
68 | static void __init | |
69 | spruce_setup_hose(void) | |
70 | { | |
71 | struct pci_controller *hose; | |
72 | ||
73 | /* Setup hose */ | |
74 | hose = pcibios_alloc_controller(); | |
75 | if (!hose) | |
76 | return; | |
77 | ||
78 | hose->first_busno = 0; | |
79 | hose->last_busno = 0xff; | |
80 | ||
81 | pci_init_resource(&hose->io_resource, | |
82 | SPRUCE_PCI_LOWER_IO, | |
83 | SPRUCE_PCI_UPPER_IO, | |
84 | IORESOURCE_IO, | |
85 | "PCI host bridge"); | |
86 | ||
87 | pci_init_resource(&hose->mem_resources[0], | |
88 | SPRUCE_PCI_LOWER_MEM, | |
89 | SPRUCE_PCI_UPPER_MEM, | |
90 | IORESOURCE_MEM, | |
91 | "PCI host bridge"); | |
92 | ||
93 | hose->io_space.start = SPRUCE_PCI_LOWER_IO; | |
94 | hose->io_space.end = SPRUCE_PCI_UPPER_IO; | |
95 | hose->mem_space.start = SPRUCE_PCI_LOWER_MEM; | |
96 | hose->mem_space.end = SPRUCE_PCI_UPPER_MEM; | |
97 | hose->io_base_virt = (void *)SPRUCE_ISA_IO_BASE; | |
98 | ||
99 | setup_indirect_pci(hose, | |
100 | SPRUCE_PCI_CONFIG_ADDR, | |
101 | SPRUCE_PCI_CONFIG_DATA); | |
102 | ||
103 | hose->last_busno = pciauto_bus_scan(hose, hose->first_busno); | |
104 | ||
105 | ppc_md.pci_swizzle = common_swizzle; | |
106 | ppc_md.pci_map_irq = spruce_map_irq; | |
107 | } | |
108 | ||
109 | /* | |
110 | * CPC700 PIC interrupt programming table | |
111 | * | |
112 | * First entry is the sensitivity (level/edge), second is the polarity. | |
113 | */ | |
114 | unsigned int cpc700_irq_assigns[32][2] = { | |
115 | { 1, 1 }, /* IRQ 0: ECC Correctable Error - rising edge */ | |
116 | { 1, 1 }, /* IRQ 1: PCI Write Mem Range - rising edge */ | |
117 | { 0, 1 }, /* IRQ 2: PCI Write Command Reg - active high */ | |
118 | { 0, 1 }, /* IRQ 3: UART 0 - active high */ | |
119 | { 0, 1 }, /* IRQ 4: UART 1 - active high */ | |
120 | { 0, 1 }, /* IRQ 5: ICC 0 - active high */ | |
121 | { 0, 1 }, /* IRQ 6: ICC 1 - active high */ | |
122 | { 0, 1 }, /* IRQ 7: GPT Compare 0 - active high */ | |
123 | { 0, 1 }, /* IRQ 8: GPT Compare 1 - active high */ | |
124 | { 0, 1 }, /* IRQ 9: GPT Compare 2 - active high */ | |
125 | { 0, 1 }, /* IRQ 10: GPT Compare 3 - active high */ | |
126 | { 0, 1 }, /* IRQ 11: GPT Compare 4 - active high */ | |
127 | { 0, 1 }, /* IRQ 12: GPT Capture 0 - active high */ | |
128 | { 0, 1 }, /* IRQ 13: GPT Capture 1 - active high */ | |
129 | { 0, 1 }, /* IRQ 14: GPT Capture 2 - active high */ | |
130 | { 0, 1 }, /* IRQ 15: GPT Capture 3 - active high */ | |
131 | { 0, 1 }, /* IRQ 16: GPT Capture 4 - active high */ | |
132 | { 0, 0 }, /* IRQ 17: Reserved */ | |
133 | { 0, 0 }, /* IRQ 18: Reserved */ | |
134 | { 0, 0 }, /* IRQ 19: Reserved */ | |
135 | { 0, 1 }, /* IRQ 20: FPGA EXT_IRQ0 - active high */ | |
136 | { 1, 1 }, /* IRQ 21: Mouse - rising edge */ | |
137 | { 1, 1 }, /* IRQ 22: Keyboard - rising edge */ | |
138 | { 0, 0 }, /* IRQ 23: PCI Slot 3 - active low */ | |
139 | { 0, 0 }, /* IRQ 24: PCI Slot 2 - active low */ | |
140 | { 0, 0 }, /* IRQ 25: PCI Slot 1 - active low */ | |
141 | { 0, 0 }, /* IRQ 26: PCI Slot 0 - active low */ | |
142 | }; | |
143 | ||
144 | static void __init | |
145 | spruce_calibrate_decr(void) | |
146 | { | |
147 | int freq, divisor = 4; | |
148 | ||
149 | /* determine processor bus speed */ | |
150 | freq = SPRUCE_BUS_SPEED; | |
151 | tb_ticks_per_jiffy = freq / HZ / divisor; | |
152 | tb_to_us = mulhwu_scale_factor(freq/divisor, 1000000); | |
153 | } | |
154 | ||
155 | static int | |
156 | spruce_show_cpuinfo(struct seq_file *m) | |
157 | { | |
158 | seq_printf(m, "vendor\t\t: IBM\n"); | |
159 | seq_printf(m, "machine\t\t: Spruce\n"); | |
160 | ||
161 | return 0; | |
162 | } | |
163 | ||
164 | static void __init | |
165 | spruce_early_serial_map(void) | |
166 | { | |
167 | u32 uart_clk; | |
168 | struct uart_port serial_req; | |
169 | ||
170 | if (SPRUCE_UARTCLK_IS_33M(readb(SPRUCE_FPGA_REG_A))) | |
171 | uart_clk = SPRUCE_BAUD_33M * 16; | |
172 | else | |
173 | uart_clk = SPRUCE_BAUD_30M * 16; | |
174 | ||
175 | /* Setup serial port access */ | |
176 | memset(&serial_req, 0, sizeof(serial_req)); | |
177 | serial_req.uartclk = uart_clk; | |
178 | serial_req.irq = UART0_INT; | |
179 | serial_req.flags = ASYNC_BOOT_AUTOCONF; | |
9b4a1617 | 180 | serial_req.iotype = UPIO_MEM; |
1da177e4 LT |
181 | serial_req.membase = (u_char *)UART0_IO_BASE; |
182 | serial_req.regshift = 0; | |
183 | ||
184 | #if defined(CONFIG_KGDB) || defined(CONFIG_SERIAL_TEXT_DEBUG) | |
185 | gen550_init(0, &serial_req); | |
186 | #endif | |
187 | #ifdef CONFIG_SERIAL_8250 | |
188 | if (early_serial_setup(&serial_req) != 0) | |
189 | printk("Early serial init of port 0 failed\n"); | |
190 | #endif | |
191 | ||
192 | /* Assume early_serial_setup() doesn't modify serial_req */ | |
193 | serial_req.line = 1; | |
194 | serial_req.irq = UART1_INT; | |
195 | serial_req.membase = (u_char *)UART1_IO_BASE; | |
196 | ||
197 | #if defined(CONFIG_KGDB) || defined(CONFIG_SERIAL_TEXT_DEBUG) | |
198 | gen550_init(1, &serial_req); | |
199 | #endif | |
200 | #ifdef CONFIG_SERIAL_8250 | |
201 | if (early_serial_setup(&serial_req) != 0) | |
202 | printk("Early serial init of port 1 failed\n"); | |
203 | #endif | |
204 | } | |
205 | ||
206 | TODC_ALLOC(); | |
207 | ||
208 | static void __init | |
209 | spruce_setup_arch(void) | |
210 | { | |
211 | /* Setup TODC access */ | |
212 | TODC_INIT(TODC_TYPE_DS1643, 0, 0, SPRUCE_RTC_BASE_ADDR, 8); | |
213 | ||
214 | /* init to some ~sane value until calibrate_delay() runs */ | |
215 | loops_per_jiffy = 50000000 / HZ; | |
216 | ||
217 | /* Setup PCI host bridge */ | |
218 | spruce_setup_hose(); | |
219 | ||
220 | #ifdef CONFIG_BLK_DEV_INITRD | |
221 | if (initrd_start) | |
222 | ROOT_DEV = Root_RAM0; | |
223 | else | |
224 | #endif | |
225 | #ifdef CONFIG_ROOT_NFS | |
226 | ROOT_DEV = Root_NFS; | |
227 | #else | |
228 | ROOT_DEV = Root_SDA1; | |
229 | #endif | |
230 | ||
231 | /* Identify the system */ | |
232 | printk(KERN_INFO "System Identification: IBM Spruce\n"); | |
233 | printk(KERN_INFO "Port by MontaVista Software, Inc. (source@mvista.com)\n"); | |
234 | } | |
235 | ||
236 | static void | |
237 | spruce_restart(char *cmd) | |
238 | { | |
239 | local_irq_disable(); | |
240 | ||
241 | /* SRR0 has system reset vector, SRR1 has default MSR value */ | |
242 | /* rfi restores MSR from SRR1 and sets the PC to the SRR0 value */ | |
243 | __asm__ __volatile__ | |
244 | ("\n\ | |
245 | lis 3,0xfff0 \n\ | |
246 | ori 3,3,0x0100 \n\ | |
247 | mtspr 26,3 \n\ | |
248 | li 3,0 \n\ | |
249 | mtspr 27,3 \n\ | |
250 | rfi \n\ | |
251 | "); | |
252 | for(;;); | |
253 | } | |
254 | ||
255 | static void | |
256 | spruce_power_off(void) | |
257 | { | |
258 | for(;;); | |
259 | } | |
260 | ||
261 | static void | |
262 | spruce_halt(void) | |
263 | { | |
264 | spruce_restart(NULL); | |
265 | } | |
266 | ||
267 | static void __init | |
268 | spruce_map_io(void) | |
269 | { | |
270 | io_block_mapping(SPRUCE_PCI_IO_BASE, SPRUCE_PCI_PHY_IO_BASE, | |
271 | 0x08000000, _PAGE_IO); | |
272 | } | |
273 | ||
274 | /* | |
275 | * Set BAT 3 to map 0xf8000000 to end of physical memory space 1-to-1. | |
276 | */ | |
277 | static __inline__ void | |
278 | spruce_set_bat(void) | |
279 | { | |
280 | mb(); | |
281 | mtspr(SPRN_DBAT1U, 0xf8000ffe); | |
282 | mtspr(SPRN_DBAT1L, 0xf800002a); | |
283 | mb(); | |
284 | } | |
285 | ||
286 | void __init | |
287 | platform_init(unsigned long r3, unsigned long r4, unsigned long r5, | |
288 | unsigned long r6, unsigned long r7) | |
289 | { | |
290 | parse_bootinfo(find_bootinfo()); | |
291 | ||
292 | /* Map in board regs, etc. */ | |
293 | spruce_set_bat(); | |
294 | ||
295 | isa_io_base = SPRUCE_ISA_IO_BASE; | |
296 | pci_dram_offset = SPRUCE_PCI_SYS_MEM_BASE; | |
297 | ||
298 | ppc_md.setup_arch = spruce_setup_arch; | |
299 | ppc_md.show_cpuinfo = spruce_show_cpuinfo; | |
300 | ppc_md.init_IRQ = cpc700_init_IRQ; | |
301 | ppc_md.get_irq = cpc700_get_irq; | |
302 | ||
303 | ppc_md.setup_io_mappings = spruce_map_io; | |
304 | ||
305 | ppc_md.restart = spruce_restart; | |
306 | ppc_md.power_off = spruce_power_off; | |
307 | ppc_md.halt = spruce_halt; | |
308 | ||
309 | ppc_md.time_init = todc_time_init; | |
310 | ppc_md.set_rtc_time = todc_set_rtc_time; | |
311 | ppc_md.get_rtc_time = todc_get_rtc_time; | |
312 | ppc_md.calibrate_decr = spruce_calibrate_decr; | |
313 | ||
314 | ppc_md.nvram_read_val = todc_direct_read_val; | |
315 | ppc_md.nvram_write_val = todc_direct_write_val; | |
316 | ||
317 | spruce_early_serial_map(); | |
318 | ||
319 | #ifdef CONFIG_SERIAL_TEXT_DEBUG | |
320 | ppc_md.progress = gen550_progress; | |
321 | #endif /* CONFIG_SERIAL_TEXT_DEBUG */ | |
322 | #ifdef CONFIG_KGDB | |
323 | ppc_md.kgdb_map_scc = gen550_kgdb_map_scc; | |
324 | #endif | |
325 | } |