MINI2440: Auto probe for SDRAM size
[u-boot-openmoko/mini2440.git] / board / pn62 / misc.c
blobdcb2db5a9f70156edcdfb8791d4ae8449b5d755c
1 /*
2 * (C) Copyright 2002 Wolfgang Grandegger <wg@denx.de>
4 * See file CREDITS for list of people who contributed to this
5 * project.
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation; either version 2 of
10 * the License, or (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
20 * MA 02111-1307 USA
23 #include <common.h>
24 #include <mpc824x.h>
25 #include <asm/io.h>
26 #include <pci.h>
28 #include "pn62.h"
30 typedef struct {
31 pci_dev_t devno;
32 volatile u32 *csr;
34 } i2155x_t;
36 static i2155x_t i2155x = { 0, NULL };
38 static struct pci_device_id i2155x_ids[] = {
39 { 0x1011, 0x0046 }, /* i21554 */
40 { 0x8086, 0xb555 } /* i21555 */
43 int i2155x_init(void)
45 pci_dev_t devno;
46 u32 val;
47 int i;
50 * Find the Intel bridge.
52 if ((devno = pci_find_devices(i2155x_ids, 0)) < 0) {
53 printf("Error: Intel bridge 2155x not found!\n");
54 return -1;
56 i2155x.devno = devno;
59 * Get auto-configured base address for CSR access.
61 pci_read_config_dword(devno, PCI_BASE_ADDRESS_1, &val);
62 if (val & PCI_BASE_ADDRESS_SPACE_IO) {
63 val &= PCI_BASE_ADDRESS_IO_MASK;
64 i2155x.csr = (volatile u32 *)(_IO_BASE + val);
65 } else {
66 val &= PCI_BASE_ADDRESS_MEM_MASK;
67 i2155x.csr = (volatile u32 *)val;
71 * Translate downstream memory 2 (bar3) to base of shared memory.
73 i2155x_set_bar_base(3, PN62_SMEM_DEFAULT);
76 * Enable memory space, I/O space and bus master bits
77 * in both Primary and Secondary command registers.
79 val = PCI_COMMAND_MEMORY|PCI_COMMAND_MASTER|PCI_COMMAND_IO;
80 pci_write_config_word(devno, 0x44, val);
81 pci_write_config_word(devno, 0x04, val);
84 * Clear scratchpad registers.
86 for (i = 0; i < (I2155X_SCRAPAD_MAX - 1); i++) {
87 i2155x_write_scrapad(i, 0x0);
91 * Set interrupt line for Linux.
93 pci_write_config_byte(devno, PCI_INTERRUPT_LINE, 3);
95 return 0;
99 * Access the Scratchpad registers 0..7 of the Intel bridge.
101 void i2155x_write_scrapad(int idx, u32 val)
103 if (idx >= 0 && idx < I2155X_SCRAPAD_MAX)
104 out_le32(i2155x.csr + (I2155X_SCRAPAD_ADDR/4) + idx, val);
105 else
106 printf("i2155x_write_scrapad: invalid index\n");
109 u32 i2155x_read_scrapad(int idx)
111 if (idx >= 0 && idx < I2155X_SCRAPAD_MAX)
112 return in_le32(i2155x.csr + (I2155X_SCRAPAD_ADDR/4) + idx);
113 else
114 printf("i2155x_read_scrapad: invalid index\n");
115 return -1;
118 void i2155x_set_bar_base(int bar, u32 base)
120 if (bar >= 2 && bar <= 4) {
121 pci_write_config_dword(i2155x.devno,
122 I2155X_BAR2_BASE + (bar - 2) * 4,
123 base);
128 * Read Vital Product Data (VPD) from the Serial EPROM attached
129 * to the Intel bridge.
131 int i2155x_read_vpd(int offset, int size, unsigned char *data)
133 int i, n;
134 u16 val16;
136 for (i = 0; i < size; i++) {
137 pci_write_config_word(i2155x.devno, I2155X_VPD_ADDR,
138 offset + i - I2155X_VPD_START);
139 for (n = 10000; n > 0; n--) {
140 pci_read_config_word(i2155x.devno, I2155X_VPD_ADDR, &val16);
141 if ((val16 & 0x8000) != 0) /* wait for completion */
142 break;
143 udelay(100);
145 if (n == 0) {
146 printf("i2155x_read_vpd: TIMEOUT\n");
147 return -1;
150 pci_read_config_byte(i2155x.devno, I2155X_VPD_DATA, &data[i]);
153 return i;
156 static struct pci_device_id am79c95x_ids [] = {
157 { PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_LANCE },
163 * Initialize the AMD ethernet controllers.
165 int am79c95x_init(void)
167 pci_dev_t devno;
168 int i;
171 * Set interrupt line for Linux.
173 for (i = 0; i < 2; i++) {
174 if ((devno = pci_find_devices(am79c95x_ids, i)) < 0)
175 break;
176 pci_write_config_byte(devno, PCI_INTERRUPT_LINE, 2+i);
178 if (i < 2)
179 printf("Error: Only %d AMD Ethernet Controller found!\n", i);
181 return 0;
185 void set_led(unsigned int number, unsigned int function)
187 volatile u8 *addr;
189 if ((number >= 0) && (number < PN62_LED_MAX) &&
190 (function >= 0) && (function <= LED_LAST_FUNCTION)) {
191 addr = (volatile u8 *)(PN62_LED_BASE + number * 8);
192 out_8(addr, function&0xff);
197 * Show fatal error indicated by Kinght Rider(tm) effect
198 * in LEDS 0-7. LEDS 8-11 contain 4 bit error code.
199 * Note: this function will not terminate.
201 void fatal_error(unsigned int error_code)
203 int i, d;
205 for (i = 0; i < 12; i++) {
206 set_led(i, LED_0);
210 * Write error code.
212 set_led(8, (error_code & 0x01) ? LED_1 : LED_0);
213 set_led(9, (error_code & 0x02) ? LED_1 : LED_0);
214 set_led(10, (error_code & 0x04) ? LED_1 : LED_0);
215 set_led(11, (error_code & 0x08) ? LED_1 : LED_0);
218 * Yay - Knight Rider effect!
220 while(1) {
221 unsigned int delay = 2000;
223 for (i = 0; i < 8; i++) {
224 set_led(i, LED_1);
225 for (d = 0; d < delay; d++);
226 set_led(i, LED_0);
229 for (i = 7; i > 0; i--) {
230 set_led(i, LED_1);
231 for (d = 0; d < delay; d++);
232 set_led(i, LED_0);