tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Pb1550 board support.
3 *
4 * Copyright (C) 2009-2011 Manuel Lauss
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21#include <linux/dma-mapping.h>
22#include <linux/init.h>
23#include <linux/interrupt.h>
24#include <linux/platform_device.h>
25#include <asm/mach-au1x00/au1000.h>
26#include <asm/mach-au1x00/au1xxx_dbdma.h>
27#include <asm/mach-au1x00/au1550nd.h>
28#include <asm/mach-au1x00/gpio.h>
29#include <asm/mach-db1x00/bcsr.h>
30#include "platform.h"
31
32const char *get_system_type(void)
33{
34 return "PB1550";
35}
36
37void __init board_setup(void)
38{
39 u32 pin_func;
40
41 bcsr_init(PB1550_BCSR_PHYS_ADDR,
42 PB1550_BCSR_PHYS_ADDR + PB1550_BCSR_HEXLED_OFS);
43
44 alchemy_gpio2_enable();
45
46 /*
47 * Enable PSC1 SYNC for AC'97. Normaly done in audio driver,
48 * but it is board specific code, so put it here.
49 */
50 pin_func = au_readl(SYS_PINFUNC);
51 au_sync();
52 pin_func |= SYS_PF_MUST_BE_SET | SYS_PF_PSC1_S1;
53 au_writel(pin_func, SYS_PINFUNC);
54
55 bcsr_write(BCSR_PCMCIA, 0); /* turn off PCMCIA power */
56
57 printk(KERN_INFO "AMD Alchemy Pb1550 Board\n");
58}
59
60/******************************************************************************/
61
62static int pb1550_map_pci_irq(const struct pci_dev *d, u8 slot, u8 pin)
63{
64 if ((slot < 12) || (slot > 13) || pin == 0)
65 return -1;
66 if (slot == 12) {
67 switch (pin) {
68 case 1: return AU1500_PCI_INTB;
69 case 2: return AU1500_PCI_INTC;
70 case 3: return AU1500_PCI_INTD;
71 case 4: return AU1500_PCI_INTA;
72 }
73 }
74 if (slot == 13) {
75 switch (pin) {
76 case 1: return AU1500_PCI_INTA;
77 case 2: return AU1500_PCI_INTB;
78 case 3: return AU1500_PCI_INTC;
79 case 4: return AU1500_PCI_INTD;
80 }
81 }
82 return -1;
83}
84
85static struct resource alchemy_pci_host_res[] = {
86 [0] = {
87 .start = AU1500_PCI_PHYS_ADDR,
88 .end = AU1500_PCI_PHYS_ADDR + 0xfff,
89 .flags = IORESOURCE_MEM,
90 },
91};
92
93static struct alchemy_pci_platdata pb1550_pci_pd = {
94 .board_map_irq = pb1550_map_pci_irq,
95};
96
97static struct platform_device pb1550_pci_host = {
98 .dev.platform_data = &pb1550_pci_pd,
99 .name = "alchemy-pci",
100 .id = 0,
101 .num_resources = ARRAY_SIZE(alchemy_pci_host_res),
102 .resource = alchemy_pci_host_res,
103};
104
105static struct resource au1550_psc2_res[] = {
106 [0] = {
107 .start = AU1550_PSC2_PHYS_ADDR,
108 .end = AU1550_PSC2_PHYS_ADDR + 0xfff,
109 .flags = IORESOURCE_MEM,
110 },
111 [1] = {
112 .start = AU1550_PSC2_INT,
113 .end = AU1550_PSC2_INT,
114 .flags = IORESOURCE_IRQ,
115 },
116 [2] = {
117 .start = AU1550_DSCR_CMD0_PSC2_TX,
118 .end = AU1550_DSCR_CMD0_PSC2_TX,
119 .flags = IORESOURCE_DMA,
120 },
121 [3] = {
122 .start = AU1550_DSCR_CMD0_PSC2_RX,
123 .end = AU1550_DSCR_CMD0_PSC2_RX,
124 .flags = IORESOURCE_DMA,
125 },
126};
127
128static struct platform_device pb1550_i2c_dev = {
129 .name = "au1xpsc_smbus",
130 .id = 0, /* bus number */
131 .num_resources = ARRAY_SIZE(au1550_psc2_res),
132 .resource = au1550_psc2_res,
133};
134
135static struct mtd_partition pb1550_nand_parts[] = {
136 [0] = {
137 .name = "NAND FS 0",
138 .offset = 0,
139 .size = 8 * 1024 * 1024,
140 },
141 [1] = {
142 .name = "NAND FS 1",
143 .offset = MTDPART_OFS_APPEND,
144 .size = MTDPART_SIZ_FULL,
145 },
146};
147
148static struct au1550nd_platdata pb1550_nand_pd = {
149 .parts = pb1550_nand_parts,
150 .num_parts = ARRAY_SIZE(pb1550_nand_parts),
151 .devwidth = 0, /* x8 NAND default, needs fixing up */
152};
153
154static struct resource pb1550_nand_res[] = {
155 [0] = {
156 .start = 0x20000000,
157 .end = 0x20000fff,
158 .flags = IORESOURCE_MEM,
159 },
160};
161
162static struct platform_device pb1550_nand_dev = {
163 .name = "au1550-nand",
164 .id = -1,
165 .resource = pb1550_nand_res,
166 .num_resources = ARRAY_SIZE(pb1550_nand_res),
167 .dev = {
168 .platform_data = &pb1550_nand_pd,
169 },
170};
171
172static void __init pb1550_nand_setup(void)
173{
174 int boot_swapboot = (au_readl(MEM_STSTAT) & (0x7 << 1)) |
175 ((bcsr_read(BCSR_STATUS) >> 6) & 0x1);
176
177 switch (boot_swapboot) {
178 case 0:
179 case 2:
180 case 8:
181 case 0xC:
182 case 0xD:
183 /* x16 NAND Flash */
184 pb1550_nand_pd.devwidth = 1;
185 /* fallthrough */
186 case 1:
187 case 9:
188 case 3:
189 case 0xE:
190 case 0xF:
191 /* x8 NAND, already set up */
192 platform_device_register(&pb1550_nand_dev);
193 }
194}
195
196static int __init pb1550_dev_init(void)
197{
198 int swapped;
199
200 irq_set_irq_type(AU1550_GPIO0_INT, IRQF_TRIGGER_LOW);
201 irq_set_irq_type(AU1550_GPIO1_INT, IRQF_TRIGGER_LOW);
202 irq_set_irq_type(AU1550_GPIO201_205_INT, IRQF_TRIGGER_HIGH);
203
204 /* enable both PCMCIA card irqs in the shared line */
205 alchemy_gpio2_enable_int(201);
206 alchemy_gpio2_enable_int(202);
207
208 /* Pb1550, like all others, also has statuschange irqs; however they're
209 * wired up on one of the Au1550's shared GPIO201_205 line, which also
210 * services the PCMCIA card interrupts. So we ignore statuschange and
211 * use the GPIO201_205 exclusively for card interrupts, since a) pcmcia
212 * drivers are used to shared irqs and b) statuschange isn't really use-
213 * ful anyway.
214 */
215 db1x_register_pcmcia_socket(
216 AU1000_PCMCIA_ATTR_PHYS_ADDR,
217 AU1000_PCMCIA_ATTR_PHYS_ADDR + 0x000400000 - 1,
218 AU1000_PCMCIA_MEM_PHYS_ADDR,
219 AU1000_PCMCIA_MEM_PHYS_ADDR + 0x000400000 - 1,
220 AU1000_PCMCIA_IO_PHYS_ADDR,
221 AU1000_PCMCIA_IO_PHYS_ADDR + 0x000010000 - 1,
222 AU1550_GPIO201_205_INT, AU1550_GPIO0_INT, 0, 0, 0);
223
224 db1x_register_pcmcia_socket(
225 AU1000_PCMCIA_ATTR_PHYS_ADDR + 0x008000000,
226 AU1000_PCMCIA_ATTR_PHYS_ADDR + 0x008400000 - 1,
227 AU1000_PCMCIA_MEM_PHYS_ADDR + 0x008000000,
228 AU1000_PCMCIA_MEM_PHYS_ADDR + 0x008400000 - 1,
229 AU1000_PCMCIA_IO_PHYS_ADDR + 0x008000000,
230 AU1000_PCMCIA_IO_PHYS_ADDR + 0x008010000 - 1,
231 AU1550_GPIO201_205_INT, AU1550_GPIO1_INT, 0, 0, 1);
232
233 /* NAND setup */
234 gpio_direction_input(206); /* GPIO206 high */
235 pb1550_nand_setup();
236
237 swapped = bcsr_read(BCSR_STATUS) & BCSR_STATUS_PB1550_SWAPBOOT;
238 db1x_register_norflash(128 * 1024 * 1024, 4, swapped);
239 platform_device_register(&pb1550_pci_host);
240 platform_device_register(&pb1550_i2c_dev);
241
242 return 0;
243}
244arch_initcall(pb1550_dev_init);