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1 /*
2  * arch/ppc/platforms/4xx/bamboo.c
3  *
4  * Bamboo board specific routines
5  *
6  * Wade Farnsworth <wfarnsworth@mvista.com>
7  * Copyright 2004 MontaVista Software Inc.
8  *
9  * This program is free software; you can redistribute  it and/or modify it
10  * under  the terms of  the GNU General  Public License as published by the
11  * Free Software Foundation;  either version 2 of the  License, or (at your
12  * option) any later version.
13  */
14
15 #include <linux/config.h>
16 #include <linux/stddef.h>
17 #include <linux/kernel.h>
18 #include <linux/init.h>
19 #include <linux/errno.h>
20 #include <linux/reboot.h>
21 #include <linux/pci.h>
22 #include <linux/kdev_t.h>
23 #include <linux/types.h>
24 #include <linux/major.h>
25 #include <linux/blkdev.h>
26 #include <linux/console.h>
27 #include <linux/delay.h>
28 #include <linux/ide.h>
29 #include <linux/initrd.h>
30 #include <linux/irq.h>
31 #include <linux/seq_file.h>
32 #include <linux/root_dev.h>
33 #include <linux/tty.h>
34 #include <linux/serial.h>
35 #include <linux/serial_core.h>
36 #include <linux/ethtool.h>
37
38 #include <asm/system.h>
39 #include <asm/pgtable.h>
40 #include <asm/page.h>
41 #include <asm/dma.h>
42 #include <asm/io.h>
43 #include <asm/machdep.h>
44 #include <asm/ocp.h>
45 #include <asm/pci-bridge.h>
46 #include <asm/time.h>
47 #include <asm/todc.h>
48 #include <asm/bootinfo.h>
49 #include <asm/ppc4xx_pic.h>
50 #include <asm/ppcboot.h>
51
52 #include <syslib/gen550.h>
53 #include <syslib/ibm440gx_common.h>
54
55 /*
56  * This is a horrible kludge, we eventually need to abstract this
57  * generic PHY stuff, so the  standard phy mode defines can be
58  * easily used from arch code.
59  */
60 #include "../../../../drivers/net/ibm_emac/ibm_emac_phy.h"
61
62 bd_t __res;
63
64 static struct ibm44x_clocks clocks __initdata;
65
66 /*
67  * Bamboo external IRQ triggering/polarity settings
68  */
69 unsigned char ppc4xx_uic_ext_irq_cfg[] __initdata = {
70         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* IRQ0: Ethernet transceiver */
71         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* IRQ1: Expansion connector */
72         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* IRQ2: PCI slot 0 */
73         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* IRQ3: PCI slot 1 */
74         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* IRQ4: PCI slot 2 */
75         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* IRQ5: PCI slot 3 */
76         (IRQ_SENSE_EDGE  | IRQ_POLARITY_NEGATIVE), /* IRQ6: SMI pushbutton */
77         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* IRQ7: EXT */
78         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* IRQ8: EXT */
79         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* IRQ9: EXT */
80 };
81
82 static void __init
83 bamboo_calibrate_decr(void)
84 {
85         unsigned int freq;
86
87         if (mfspr(SPRN_CCR1) & CCR1_TCS)
88                 freq = BAMBOO_TMRCLK;
89         else
90                 freq = clocks.cpu;
91
92         ibm44x_calibrate_decr(freq);
93
94 }
95
96 static int
97 bamboo_show_cpuinfo(struct seq_file *m)
98 {
99         seq_printf(m, "vendor\t\t: IBM\n");
100         seq_printf(m, "machine\t\t: PPC440EP EVB (Bamboo)\n");
101
102         return 0;
103 }
104
105 static inline int
106 bamboo_map_irq(struct pci_dev *dev, unsigned char idsel, unsigned char pin)
107 {
108         static char pci_irq_table[][4] =
109         /*
110          *      PCI IDSEL/INTPIN->INTLINE
111          *         A   B   C   D
112          */
113         {
114                 { 28, 28, 28, 28 },     /* IDSEL 1 - PCI Slot 0 */
115                 { 27, 27, 27, 27 },     /* IDSEL 2 - PCI Slot 1 */
116                 { 26, 26, 26, 26 },     /* IDSEL 3 - PCI Slot 2 */
117                 { 25, 25, 25, 25 },     /* IDSEL 4 - PCI Slot 3 */
118         };
119
120         const long min_idsel = 1, max_idsel = 4, irqs_per_slot = 4;
121         return PCI_IRQ_TABLE_LOOKUP;
122 }
123
124 static void __init bamboo_set_emacdata(void)
125 {
126         unsigned char * selection1_base;
127         struct ocp_def *def;
128         struct ocp_func_emac_data *emacdata;
129         u8 selection1_val;
130         int mode;
131
132         selection1_base = ioremap64(BAMBOO_FPGA_SELECTION1_REG_ADDR, 16);
133         selection1_val = readb(selection1_base);
134         iounmap((void *) selection1_base);
135         if (BAMBOO_SEL_MII(selection1_val))
136                 mode = PHY_MODE_MII;
137         else if (BAMBOO_SEL_RMII(selection1_val))
138                 mode = PHY_MODE_RMII;
139         else
140                 mode = PHY_MODE_SMII;
141
142         /* Set mac_addr and phy mode for each EMAC */
143
144         def = ocp_get_one_device(OCP_VENDOR_IBM, OCP_FUNC_EMAC, 0);
145         emacdata = def->additions;
146         memcpy(emacdata->mac_addr, __res.bi_enetaddr, 6);
147         emacdata->phy_mode = mode;
148
149         def = ocp_get_one_device(OCP_VENDOR_IBM, OCP_FUNC_EMAC, 1);
150         emacdata = def->additions;
151         memcpy(emacdata->mac_addr, __res.bi_enet1addr, 6);
152         emacdata->phy_mode = mode;
153 }
154
155 static int
156 bamboo_exclude_device(unsigned char bus, unsigned char devfn)
157 {
158         return (bus == 0 && devfn == 0);
159 }
160
161 #define PCI_READW(offset) \
162         (readw((void *)((u32)pci_reg_base+offset)))
163
164 #define PCI_WRITEW(value, offset) \
165         (writew(value, (void *)((u32)pci_reg_base+offset)))
166
167 #define PCI_WRITEL(value, offset) \
168         (writel(value, (void *)((u32)pci_reg_base+offset)))
169
170 static void __init
171 bamboo_setup_pci(void)
172 {
173         void *pci_reg_base;
174         unsigned long memory_size;
175         memory_size = ppc_md.find_end_of_memory();
176
177         pci_reg_base = ioremap64(BAMBOO_PCIL0_BASE, BAMBOO_PCIL0_SIZE);
178
179         /* Enable PCI I/O, Mem, and Busmaster cycles */
180         PCI_WRITEW(PCI_READW(PCI_COMMAND) |
181                    PCI_COMMAND_MEMORY |
182                    PCI_COMMAND_MASTER, PCI_COMMAND);
183
184         /* Disable region first */
185         PCI_WRITEL(0, BAMBOO_PCIL0_PMM0MA);
186
187         /* PLB starting addr: 0x00000000A0000000 */
188         PCI_WRITEL(BAMBOO_PCI_PHY_MEM_BASE, BAMBOO_PCIL0_PMM0LA);
189
190         /* PCI start addr, 0xA0000000 (PCI Address) */
191         PCI_WRITEL(BAMBOO_PCI_MEM_BASE, BAMBOO_PCIL0_PMM0PCILA);
192         PCI_WRITEL(0, BAMBOO_PCIL0_PMM0PCIHA);
193
194         /* Enable no pre-fetch, enable region */
195         PCI_WRITEL(((0xffffffff -
196                      (BAMBOO_PCI_UPPER_MEM - BAMBOO_PCI_MEM_BASE)) | 0x01),
197                       BAMBOO_PCIL0_PMM0MA);
198
199         /* Disable region one */
200         PCI_WRITEL(0, BAMBOO_PCIL0_PMM1MA);
201         PCI_WRITEL(0, BAMBOO_PCIL0_PMM1LA);
202         PCI_WRITEL(0, BAMBOO_PCIL0_PMM1PCILA);
203         PCI_WRITEL(0, BAMBOO_PCIL0_PMM1PCIHA);
204         PCI_WRITEL(0, BAMBOO_PCIL0_PMM1MA);
205
206         /* Disable region two */
207         PCI_WRITEL(0, BAMBOO_PCIL0_PMM2MA);
208         PCI_WRITEL(0, BAMBOO_PCIL0_PMM2LA);
209         PCI_WRITEL(0, BAMBOO_PCIL0_PMM2PCILA);
210         PCI_WRITEL(0, BAMBOO_PCIL0_PMM2PCIHA);
211         PCI_WRITEL(0, BAMBOO_PCIL0_PMM2MA);
212
213         /* Now configure the PCI->PLB windows, we only use PTM1
214          *
215          * For Inbound flow, set the window size to all available memory
216          * This is required because if size is smaller,
217          * then Eth/PCI DD would fail as PCI card not able to access
218          * the memory allocated by DD.
219          */
220
221         PCI_WRITEL(0, BAMBOO_PCIL0_PTM1MS);     /* disabled region 1 */
222         PCI_WRITEL(0, BAMBOO_PCIL0_PTM1LA);     /* begin of address map */
223
224         memory_size = 1 << fls(memory_size - 1);
225
226         /* Size low + Enabled */
227         PCI_WRITEL((0xffffffff - (memory_size - 1)) | 0x1, BAMBOO_PCIL0_PTM1MS);
228
229         eieio();
230         iounmap(pci_reg_base);
231 }
232
233 static void __init
234 bamboo_setup_hose(void)
235 {
236         unsigned int bar_response, bar;
237         struct pci_controller *hose;
238
239         bamboo_setup_pci();
240
241         hose = pcibios_alloc_controller();
242
243         if (!hose)
244                 return;
245
246         hose->first_busno = 0;
247         hose->last_busno = 0xff;
248
249         hose->pci_mem_offset = BAMBOO_PCI_MEM_OFFSET;
250
251         pci_init_resource(&hose->io_resource,
252                         BAMBOO_PCI_LOWER_IO,
253                         BAMBOO_PCI_UPPER_IO,
254                         IORESOURCE_IO,
255                         "PCI host bridge");
256
257         pci_init_resource(&hose->mem_resources[0],
258                         BAMBOO_PCI_LOWER_MEM,
259                         BAMBOO_PCI_UPPER_MEM,
260                         IORESOURCE_MEM,
261                         "PCI host bridge");
262
263         ppc_md.pci_exclude_device = bamboo_exclude_device;
264
265         hose->io_space.start = BAMBOO_PCI_LOWER_IO;
266         hose->io_space.end = BAMBOO_PCI_UPPER_IO;
267         hose->mem_space.start = BAMBOO_PCI_LOWER_MEM;
268         hose->mem_space.end = BAMBOO_PCI_UPPER_MEM;
269         isa_io_base =
270                 (unsigned long)ioremap64(BAMBOO_PCI_IO_BASE, BAMBOO_PCI_IO_SIZE);
271         hose->io_base_virt = (void *)isa_io_base;
272
273         setup_indirect_pci(hose,
274                         BAMBOO_PCI_CFGA_PLB32,
275                         BAMBOO_PCI_CFGD_PLB32);
276         hose->set_cfg_type = 1;
277
278         /* Zero config bars */
279         for (bar = PCI_BASE_ADDRESS_1; bar <= PCI_BASE_ADDRESS_2; bar += 4) {
280                 early_write_config_dword(hose, hose->first_busno,
281                                          PCI_FUNC(hose->first_busno), bar,
282                                          0x00000000);
283                 early_read_config_dword(hose, hose->first_busno,
284                                         PCI_FUNC(hose->first_busno), bar,
285                                         &bar_response);
286         }
287
288         hose->last_busno = pciauto_bus_scan(hose, hose->first_busno);
289
290         ppc_md.pci_swizzle = common_swizzle;
291         ppc_md.pci_map_irq = bamboo_map_irq;
292 }
293
294 TODC_ALLOC();
295
296 static void __init
297 bamboo_early_serial_map(void)
298 {
299         struct uart_port port;
300
301         /* Setup ioremapped serial port access */
302         memset(&port, 0, sizeof(port));
303         port.membase = ioremap64(PPC440EP_UART0_ADDR, 8);
304         port.irq = 0;
305         port.uartclk = clocks.uart0;
306         port.regshift = 0;
307         port.iotype = SERIAL_IO_MEM;
308         port.flags = ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST;
309         port.line = 0;
310
311         if (early_serial_setup(&port) != 0) {
312                 printk("Early serial init of port 0 failed\n");
313         }
314
315 #if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
316         /* Configure debug serial access */
317         gen550_init(0, &port);
318 #endif
319
320         port.membase = ioremap64(PPC440EP_UART1_ADDR, 8);
321         port.irq = 1;
322         port.uartclk = clocks.uart1;
323         port.line = 1;
324
325         if (early_serial_setup(&port) != 0) {
326                 printk("Early serial init of port 1 failed\n");
327         }
328
329 #if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
330         /* Configure debug serial access */
331         gen550_init(1, &port);
332 #endif
333
334         port.membase = ioremap64(PPC440EP_UART2_ADDR, 8);
335         port.irq = 3;
336         port.uartclk = clocks.uart2;
337         port.line = 2;
338
339         if (early_serial_setup(&port) != 0) {
340                 printk("Early serial init of port 2 failed\n");
341         }
342
343 #if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
344         /* Configure debug serial access */
345         gen550_init(2, &port);
346 #endif
347
348         port.membase = ioremap64(PPC440EP_UART3_ADDR, 8);
349         port.irq = 4;
350         port.uartclk = clocks.uart3;
351         port.line = 3;
352
353         if (early_serial_setup(&port) != 0) {
354                 printk("Early serial init of port 3 failed\n");
355         }
356 }
357
358 static void __init
359 bamboo_setup_arch(void)
360 {
361
362         bamboo_set_emacdata();
363
364         ibm440gx_get_clocks(&clocks, 33333333, 6 * 1843200);
365         ocp_sys_info.opb_bus_freq = clocks.opb;
366
367         /* Setup TODC access */
368         TODC_INIT(TODC_TYPE_DS1743,
369                         0,
370                         0,
371                         ioremap64(BAMBOO_RTC_ADDR, BAMBOO_RTC_SIZE),
372                         8);
373
374         /* init to some ~sane value until calibrate_delay() runs */
375         loops_per_jiffy = 50000000/HZ;
376
377         /* Setup PCI host bridge */
378         bamboo_setup_hose();
379
380 #ifdef CONFIG_BLK_DEV_INITRD
381         if (initrd_start)
382                 ROOT_DEV = Root_RAM0;
383         else
384 #endif
385 #ifdef CONFIG_ROOT_NFS
386                 ROOT_DEV = Root_NFS;
387 #else
388                 ROOT_DEV = Root_HDA1;
389 #endif
390
391         bamboo_early_serial_map();
392
393         /* Identify the system */
394         printk("IBM Bamboo port (MontaVista Software, Inc. (source@mvista.com))\n");
395 }
396
397 void __init platform_init(unsigned long r3, unsigned long r4,
398                 unsigned long r5, unsigned long r6, unsigned long r7)
399 {
400         parse_bootinfo(find_bootinfo());
401
402         /*
403          * If we were passed in a board information, copy it into the
404          * residual data area.
405          */
406         if (r3)
407                 __res = *(bd_t *)(r3 + KERNELBASE);
408
409
410         ibm44x_platform_init();
411
412         ppc_md.setup_arch = bamboo_setup_arch;
413         ppc_md.show_cpuinfo = bamboo_show_cpuinfo;
414         ppc_md.get_irq = NULL;          /* Set in ppc4xx_pic_init() */
415
416         ppc_md.calibrate_decr = bamboo_calibrate_decr;
417         ppc_md.time_init = todc_time_init;
418         ppc_md.set_rtc_time = todc_set_rtc_time;
419         ppc_md.get_rtc_time = todc_get_rtc_time;
420
421         ppc_md.nvram_read_val = todc_direct_read_val;
422         ppc_md.nvram_write_val = todc_direct_write_val;
423 #ifdef CONFIG_KGDB
424         ppc_md.early_serial_map = bamboo_early_serial_map;
425 #endif
426 }
427