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Diffstat (limited to 'board/pn62/misc.c')
| -rw-r--r-- | board/pn62/misc.c | 235 |
1 files changed, 235 insertions, 0 deletions
diff --git a/board/pn62/misc.c b/board/pn62/misc.c new file mode 100644 index 0000000..4f71950 --- /dev/null +++ b/board/pn62/misc.c @@ -0,0 +1,235 @@ +/* + * (C) Copyright 2002 Wolfgang Grandegger <wg@denx.de> + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include <common.h> +#include <mpc824x.h> +#include <asm/io.h> +#include <pci.h> + +#include "pn62.h" + +typedef struct { + pci_dev_t devno; + volatile u32 *csr; + +} i2155x_t; + +static i2155x_t i2155x = { 0, NULL }; + +static struct pci_device_id i2155x_ids[] = { + { 0x1011, 0x0046 }, /* i21554 */ + { 0x8086, 0xb555 } /* i21555 */ +}; + +int i2155x_init(void) +{ + pci_dev_t devno; + u32 val; + int i; + + /* + * Find the Intel bridge. + */ + if ((devno = pci_find_devices(i2155x_ids, 0)) < 0) { + printf("Error: Intel bridge 2155x not found!\n"); + return -1; + } + i2155x.devno = devno; + + /* + * Get auto-configured base address for CSR access. + */ + pci_read_config_dword(devno, PCI_BASE_ADDRESS_1, &val); + if (val & PCI_BASE_ADDRESS_SPACE_IO) { + val &= PCI_BASE_ADDRESS_IO_MASK; + i2155x.csr = (volatile u32 *)(_IO_BASE + val); + } else { + val &= PCI_BASE_ADDRESS_MEM_MASK; + i2155x.csr = (volatile u32 *)val; + } + + /* + * Translate downstream memory 2 (bar3) to base of shared memory. + */ + i2155x_set_bar_base(3, PN62_SMEM_DEFAULT); + + /* + * Enable memory space, I/O space and bus master bits + * in both Primary and Secondary command registers. + */ + val = PCI_COMMAND_MEMORY|PCI_COMMAND_MASTER|PCI_COMMAND_IO; + pci_write_config_word(devno, 0x44, val); + pci_write_config_word(devno, 0x04, val); + + /* + * Clear scratchpad registers. + */ + for (i = 0; i < (I2155X_SCRAPAD_MAX - 1); i++) { + i2155x_write_scrapad(i, 0x0); + } + + /* + * Set interrupt line for Linux. + */ + pci_write_config_byte(devno, PCI_INTERRUPT_LINE, 3); + + return 0; +} + +/* + * Access the Scratchpad registers 0..7 of the Intel bridge. + */ +void i2155x_write_scrapad(int idx, u32 val) +{ + if (idx >= 0 && idx < I2155X_SCRAPAD_MAX) + out_le32(i2155x.csr + (I2155X_SCRAPAD_ADDR/4) + idx, val); + else + printf("i2155x_write_scrapad: invalid index\n"); +} + +u32 i2155x_read_scrapad(int idx) +{ + if (idx >= 0 && idx < I2155X_SCRAPAD_MAX) + return in_le32(i2155x.csr + (I2155X_SCRAPAD_ADDR/4) + idx); + else + printf("i2155x_read_scrapad: invalid index\n"); + return -1; +} + +void i2155x_set_bar_base(int bar, u32 base) +{ + if (bar >= 2 && bar <= 4) { + pci_write_config_dword(i2155x.devno, + I2155X_BAR2_BASE + (bar - 2) * 4, + base); + } +} + +/* + * Read Vital Product Data (VPD) from the Serial EPROM attached + * to the Intel bridge. + */ +int i2155x_read_vpd(int offset, int size, unsigned char *data) +{ + int i, n; + u16 val16; + + for (i = 0; i < size; i++) { + pci_write_config_word(i2155x.devno, I2155X_VPD_ADDR, + offset + i - I2155X_VPD_START); + for (n = 10000; n > 0; n--) { + pci_read_config_word(i2155x.devno, I2155X_VPD_ADDR, &val16); + if ((val16 & 0x8000) != 0) /* wait for completion */ + break; + udelay(100); + } + if (n == 0) { + printf("i2155x_read_vpd: TIMEOUT\n"); + return -1; + } + + pci_read_config_byte(i2155x.devno, I2155X_VPD_DATA, &data[i]); + } + + return i; +} + +static struct pci_device_id am79c95x_ids [] = { + { PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_LANCE }, + { } +}; + + +/* + * Initialize the AMD ethernet controllers. + */ +int am79c95x_init(void) +{ + pci_dev_t devno; + int i; + + /* + * Set interrupt line for Linux. + */ + for (i = 0; i < 2; i++) { + if ((devno = pci_find_devices(am79c95x_ids, i)) < 0) + break; + pci_write_config_byte(devno, PCI_INTERRUPT_LINE, 2+i); + } + if (i < 2) + printf("Error: Only %d AMD Ethernet Controller found!\n", i); + + return 0; +} + + +void set_led(unsigned int number, unsigned int function) +{ + volatile u8 *addr; + + if ((number >= 0) && (number < PN62_LED_MAX) && + (function >= 0) && (function <= LED_LAST_FUNCTION)) { + addr = (volatile u8 *)(PN62_LED_BASE + number * 8); + out_8(addr, function&0xff); + } +} + +/* + * Show fatal error indicated by Kinght Rider(tm) effect + * in LEDS 0-7. LEDS 8-11 contain 4 bit error code. + * Note: this function will not terminate. + */ +void fatal_error(unsigned int error_code) +{ + int i, d; + + for (i = 0; i < 12; i++) { + set_led(i, LED_0); + } + + /* + * Write error code. + */ + set_led(8, (error_code & 0x01) ? LED_1 : LED_0); + set_led(9, (error_code & 0x02) ? LED_1 : LED_0); + set_led(10, (error_code & 0x04) ? LED_1 : LED_0); + set_led(11, (error_code & 0x08) ? LED_1 : LED_0); + + /* + * Yay - Knight Rider effect! + */ + while(1) { + unsigned int delay = 2000; + + for (i = 0; i < 8; i++) { + set_led(i, LED_1); + for (d = 0; d < delay; d++); + set_led(i, LED_0); + } + + for (i = 7; i > 0; i--) { + set_led(i, LED_1); + for (d = 0; d < delay; d++); + set_led(i, LED_0); + } + } +} |