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-rw-r--r--drivers/pci/Makefile1
-rw-r--r--drivers/pci/pci_ixp.c571
2 files changed, 572 insertions, 0 deletions
diff --git a/drivers/pci/Makefile b/drivers/pci/Makefile
index bffb1eb..0c4fa80 100644
--- a/drivers/pci/Makefile
+++ b/drivers/pci/Makefile
@@ -27,6 +27,7 @@ LIB := $(obj)libpci.a
COBJS-$(CONFIG_FSL_PCI_INIT) += fsl_pci_init.o
COBJS-$(CONFIG_PCI) += pci.o pci_auto.o pci_indirect.o
+COBJS-$(CONFIG_IXP_PCI) += pci_ixp.o
COBJS-$(CONFIG_SH4_PCI) += pci_sh4.o
COBJS-$(CONFIG_SH7751_PCI) +=pci_sh7751.o
COBJS-$(CONFIG_SH7780_PCI) +=pci_sh7780.o
diff --git a/drivers/pci/pci_ixp.c b/drivers/pci/pci_ixp.c
new file mode 100644
index 0000000..aae3d3d
--- /dev/null
+++ b/drivers/pci/pci_ixp.c
@@ -0,0 +1,571 @@
+/*
+ * IXP PCI Init
+ * (C) Copyright 2004 eslab.whut.edu.cn
+ * Yue Hu(huyue_whut@yahoo.com.cn), Ligong Xue(lgxue@hotmail.com)
+ *
+ * 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 <asm/processor.h>
+#include <asm/io.h>
+#include <pci.h>
+#include <asm/arch/ixp425.h>
+#include <asm/arch/ixp425pci.h>
+
+static void non_prefetch_read (unsigned int addr, unsigned int cmd,
+ unsigned int *data);
+static void non_prefetch_write (unsigned int addr, unsigned int cmd,
+ unsigned int data);
+static void configure_pins (void);
+static void sys_pci_gpio_clock_config (void);
+static void pci_bus_scan (void);
+static int pci_device_exists (unsigned int deviceNo);
+static void sys_pci_bar_info_get (unsigned int devnum, unsigned int bus,
+ unsigned int dev, unsigned int func);
+static void sys_pci_device_bars_write (void);
+static void calc_bars (PciBar * Bars[], unsigned int nBars,
+ unsigned int startAddr);
+
+#define PCI_MEMORY_BUS 0x00000000
+#define PCI_MEMORY_PHY 0x48000000
+#define PCI_MEMORY_SIZE 0x04000000
+
+#define PCI_MEM_BUS 0x40000000
+#define PCI_MEM_PHY 0x00000000
+#define PCI_MEM_SIZE 0x04000000
+
+#define PCI_IO_BUS 0x40000000
+#define PCI_IO_PHY 0x50000000
+#define PCI_IO_SIZE 0x10000000
+
+struct pci_controller hose;
+
+unsigned int nDevices;
+unsigned int nMBars;
+unsigned int nIOBars;
+PciBar *memBars[IXP425_PCI_MAX_BAR];
+PciBar *ioBars[IXP425_PCI_MAX_BAR];
+PciDevice devices[IXP425_PCI_MAX_FUNC_ON_BUS];
+
+int pci_read_config_dword (pci_dev_t dev, int where, unsigned int *val)
+{
+ unsigned int retval;
+ unsigned int addr;
+
+ /*address bits 31:28 specify the device 10:8 specify the function */
+ /*Set the address to be read */
+ addr = BIT ((31 - dev)) | (where & ~3);
+ non_prefetch_read (addr, NP_CMD_CONFIGREAD, &retval);
+
+ *val = retval;
+
+ return (OK);
+}
+
+int pci_read_config_word (pci_dev_t dev, int where, unsigned short *val)
+{
+ unsigned int n;
+ unsigned int retval;
+ unsigned int addr;
+ unsigned int byteEnables;
+
+ n = where % 4;
+ /*byte enables are 4 bits active low, the position of each
+ bit maps to the byte that it enables */
+ byteEnables =
+ (~(BIT (n) | BIT ((n + 1)))) &
+ IXP425_PCI_BOTTOM_NIBBLE_OF_LONG_MASK;
+ byteEnables = byteEnables << PCI_NP_CBE_BESL;
+ /*address bits 31:28 specify the device 10:8 specify the function */
+ /*Set the address to be read */
+ addr = BIT ((31 - dev)) | (where & ~3);
+ non_prefetch_read (addr, byteEnables | NP_CMD_CONFIGREAD, &retval);
+
+ /*Pick out the word we are interested in */
+ *val = (retval >> (8 * n));
+
+ return (OK);
+}
+
+int pci_read_config_byte (pci_dev_t dev, int where, unsigned char *val)
+{
+ unsigned int retval;
+ unsigned int n;
+ unsigned int byteEnables;
+ unsigned int addr;
+
+ n = where % 4;
+ /*byte enables are 4 bits, active low, the position of each
+ bit maps to the byte that it enables */
+ byteEnables = (~BIT (n)) & IXP425_PCI_BOTTOM_NIBBLE_OF_LONG_MASK;
+ byteEnables = byteEnables << PCI_NP_CBE_BESL;
+
+ /*address bits 31:28 specify the device, 10:8 specify the function */
+ /*Set the address to be read */
+ addr = BIT ((31 - dev)) | (where & ~3);
+ non_prefetch_read (addr, byteEnables | NP_CMD_CONFIGREAD, &retval);
+ /*Pick out the byte we are interested in */
+ *val = (retval >> (8 * n));
+
+ return (OK);
+}
+
+int pci_write_config_byte (pci_dev_t dev, int where, unsigned char val)
+{
+ unsigned int addr;
+ unsigned int byteEnables;
+ unsigned int n;
+ unsigned int ldata;
+
+ n = where % 4;
+ /*byte enables are 4 bits active low, the position of each
+ bit maps to the byte that it enables */
+ byteEnables = (~BIT (n)) & IXP425_PCI_BOTTOM_NIBBLE_OF_LONG_MASK;
+ byteEnables = byteEnables << PCI_NP_CBE_BESL;
+ ldata = val << (8 * n);
+ /*address bits 31:28 specify the device 10:8 specify the function */
+ /*Set the address to be written */
+ addr = BIT ((31 - dev)) | (where & ~3);
+ non_prefetch_write (addr, byteEnables | NP_CMD_CONFIGWRITE, ldata);
+
+ return (OK);
+}
+
+int pci_write_config_word (pci_dev_t dev, int where, unsigned short val)
+{
+ unsigned int addr;
+ unsigned int byteEnables;
+ unsigned int n;
+ unsigned int ldata;
+
+ n = where % 4;
+ /*byte enables are 4 bits active low, the position of each
+ bit maps to the byte that it enables */
+ byteEnables =
+ (~(BIT (n) | BIT ((n + 1)))) &
+ IXP425_PCI_BOTTOM_NIBBLE_OF_LONG_MASK;
+ byteEnables = byteEnables << PCI_NP_CBE_BESL;
+ ldata = val << (8 * n);
+ /*address bits 31:28 specify the device 10:8 specify the function */
+ /*Set the address to be written */
+ addr = BIT (31 - dev) | (where & ~3);
+ non_prefetch_write (addr, byteEnables | NP_CMD_CONFIGWRITE, ldata);
+
+ return (OK);
+}
+
+int pci_write_config_dword (pci_dev_t dev, int where, unsigned int val)
+{
+ unsigned int addr;
+
+ /*address bits 31:28 specify the device 10:8 specify the function */
+ /*Set the address to be written */
+ addr = BIT (31 - dev) | (where & ~3);
+ non_prefetch_write (addr, NP_CMD_CONFIGWRITE, val);
+
+ return (OK);
+}
+
+void non_prefetch_read (unsigned int addr,
+ unsigned int cmd, unsigned int *data)
+{
+ REG_WRITE (PCI_CSR_BASE, PCI_NP_AD_OFFSET, addr);
+
+ /*set up and execute the read */
+ REG_WRITE (PCI_CSR_BASE, PCI_NP_CBE_OFFSET, cmd);
+
+ /*The result of the read is now in np_rdata */
+ REG_READ (PCI_CSR_BASE, PCI_NP_RDATA_OFFSET, *data);
+
+ return;
+}
+
+void non_prefetch_write (unsigned int addr,
+ unsigned int cmd, unsigned int data)
+{
+
+ REG_WRITE (PCI_CSR_BASE, PCI_NP_AD_OFFSET, addr);
+ /*set up the write */
+ REG_WRITE (PCI_CSR_BASE, PCI_NP_CBE_OFFSET, cmd);
+ /*Execute the write by writing to NP_WDATA */
+ REG_WRITE (PCI_CSR_BASE, PCI_NP_WDATA_OFFSET, data);
+
+ return;
+}
+
+/*
+ * PCI controller config registers are accessed through these functions
+ * i.e. these allow us to set up our own BARs etc.
+ */
+void crp_read (unsigned int offset, unsigned int *data)
+{
+ REG_WRITE (PCI_CSR_BASE, PCI_CRP_AD_CBE_OFFSET, offset);
+ REG_READ (PCI_CSR_BASE, PCI_CRP_RDATA_OFFSET, *data);
+}
+
+void crp_write (unsigned int offset, unsigned int data)
+{
+ /*The CRP address register bit 16 indicates that we want to do a write */
+ REG_WRITE (PCI_CSR_BASE, PCI_CRP_AD_CBE_OFFSET,
+ PCI_CRP_WRITE | offset);
+ REG_WRITE (PCI_CSR_BASE, PCI_CRP_WDATA_OFFSET, data);
+}
+
+/*struct pci_controller *hose*/
+void pci_ixp_init (struct pci_controller *hose)
+{
+ unsigned int regval;
+
+ hose->first_busno = 0;
+ hose->last_busno = 0x00;
+
+ /* System memory space */
+ pci_set_region (hose->regions + 0,
+ PCI_MEMORY_BUS,
+ PCI_MEMORY_PHY, PCI_MEMORY_SIZE, PCI_REGION_MEMORY);
+
+ /* PCI memory space */
+ pci_set_region (hose->regions + 1,
+ PCI_MEM_BUS,
+ PCI_MEM_PHY, PCI_MEM_SIZE, PCI_REGION_MEM);
+ /* PCI I/O space */
+ pci_set_region (hose->regions + 2,
+ PCI_IO_BUS, PCI_IO_PHY, PCI_IO_SIZE, PCI_REGION_IO);
+
+ hose->region_count = 3;
+
+ pci_register_hose (hose);
+
+/*
+ ==========================================================
+ Init IXP PCI
+ ==========================================================
+*/
+ REG_READ (PCI_CSR_BASE, PCI_CSR_OFFSET, regval);
+ regval |= 1 << 2;
+ REG_WRITE (PCI_CSR_BASE, PCI_CSR_OFFSET, regval);
+
+ configure_pins ();
+
+ READ_GPIO_REG (IXP425_GPIO_GPOUTR, regval);
+ WRITE_GPIO_REG (IXP425_GPIO_GPOUTR, regval & (~(1 << 13)));
+ udelay (533);
+ sys_pci_gpio_clock_config ();
+ REG_WRITE (PCI_CSR_BASE, PCI_INTEN_OFFSET, 0);
+ udelay (100);
+ READ_GPIO_REG (IXP425_GPIO_GPOUTR, regval);
+ WRITE_GPIO_REG (IXP425_GPIO_GPOUTR, regval | (1 << 13));
+ udelay (533);
+ crp_write (PCI_CFG_BASE_ADDRESS_0, IXP425_PCI_BAR_0_DEFAULT);
+ crp_write (PCI_CFG_BASE_ADDRESS_1, IXP425_PCI_BAR_1_DEFAULT);
+ crp_write (PCI_CFG_BASE_ADDRESS_2, IXP425_PCI_BAR_2_DEFAULT);
+ crp_write (PCI_CFG_BASE_ADDRESS_3, IXP425_PCI_BAR_3_DEFAULT);
+ crp_write (PCI_CFG_BASE_ADDRESS_4, IXP425_PCI_BAR_4_DEFAULT);
+ crp_write (PCI_CFG_BASE_ADDRESS_5, IXP425_PCI_BAR_5_DEFAULT);
+ /*Setup PCI-AHB and AHB-PCI address mappings */
+ REG_WRITE (PCI_CSR_BASE, PCI_AHBMEMBASE_OFFSET,
+ IXP425_PCI_AHBMEMBASE_DEFAULT);
+
+ REG_WRITE (PCI_CSR_BASE, PCI_AHBIOBASE_OFFSET,
+ IXP425_PCI_AHBIOBASE_DEFAULT);
+
+ REG_WRITE (PCI_CSR_BASE, PCI_PCIMEMBASE_OFFSET,
+ IXP425_PCI_PCIMEMBASE_DEFAULT);
+
+ crp_write (PCI_CFG_SUB_VENDOR_ID, IXP425_PCI_SUB_VENDOR_SYSTEM);
+
+ REG_READ (PCI_CSR_BASE, PCI_CSR_OFFSET, regval);
+ regval |= PCI_CSR_IC | PCI_CSR_ABE | PCI_CSR_PDS;
+ REG_WRITE (PCI_CSR_BASE, PCI_CSR_OFFSET, regval);
+ crp_write (PCI_CFG_COMMAND, PCI_CFG_CMD_MAE | PCI_CFG_CMD_BME);
+ udelay (1000);
+
+ pci_write_config_word (0, PCI_CFG_COMMAND, INITIAL_PCI_CMD);
+ REG_WRITE (PCI_CSR_BASE, PCI_ISR_OFFSET, PCI_ISR_PSE
+ | PCI_ISR_PFE | PCI_ISR_PPE | PCI_ISR_AHBE);
+#ifdef CONFIG_PCI_SCAN_SHOW
+ printf ("Device bus dev func deviceID vendorID \n");
+#endif
+ pci_bus_scan ();
+}
+
+void configure_pins (void)
+{
+ unsigned int regval;
+
+ /* Disable clock on GPIO PIN 14 */
+ READ_GPIO_REG (IXP425_GPIO_GPCLKR, regval);
+ WRITE_GPIO_REG (IXP425_GPIO_GPCLKR, regval & (~(1 << 8)));
+ READ_GPIO_REG (IXP425_GPIO_GPCLKR, regval);
+
+ READ_GPIO_REG (IXP425_GPIO_GPOER, regval);
+ WRITE_GPIO_REG (IXP425_GPIO_GPOER,
+ (((~(3 << 13)) & regval) | (0xf << 8)));
+ READ_GPIO_REG (IXP425_GPIO_GPOER, regval);
+
+ READ_GPIO_REG (IXP425_GPIO_GPIT2R, regval);
+ WRITE_GPIO_REG (IXP425_GPIO_GPIT2R,
+ (regval &
+ ((0x1 << 9) | (0x1 << 6) | (0x1 << 3) | 0x1)));
+ READ_GPIO_REG (IXP425_GPIO_GPIT2R, regval);
+
+ READ_GPIO_REG (IXP425_GPIO_GPISR, regval);
+ WRITE_GPIO_REG (IXP425_GPIO_GPISR, (regval | (0xf << 8)));
+ READ_GPIO_REG (IXP425_GPIO_GPISR, regval);
+}
+
+void sys_pci_gpio_clock_config (void)
+{
+ unsigned int regval;
+
+ READ_GPIO_REG (IXP425_GPIO_GPCLKR, regval);
+ regval |= 0x1 << 4;
+ WRITE_GPIO_REG (IXP425_GPIO_GPCLKR, regval);
+ READ_GPIO_REG (IXP425_GPIO_GPCLKR, regval);
+ regval |= 0x1 << 8;
+ WRITE_GPIO_REG (IXP425_GPIO_GPCLKR, regval);
+}
+
+void pci_bus_scan (void)
+{
+ unsigned int bus = 0, dev, func = 0;
+ unsigned short data16;
+ unsigned int data32;
+ unsigned char intPin;
+
+ /* Assign first device to ourselves */
+ devices[0].bus = 0;
+ devices[0].device = 0;
+ devices[0].func = 0;
+
+ crp_read (PCI_CFG_VENDOR_ID, &data32);
+
+ devices[0].vendor_id = data32 & IXP425_PCI_BOTTOM_WORD_OF_LONG_MASK;
+ devices[0].device_id = data32 >> 16;
+ devices[0].error = FALSE;
+ devices[0].bar[NO_BAR].size = 0; /*dummy - required */
+
+ nDevices = 1;
+
+ nMBars = 0;
+ nIOBars = 0;
+
+ for (dev = 0; dev < IXP425_PCI_MAX_DEV; dev++) {
+
+ /*Check whether a device is present */
+ if (pci_device_exists (dev) != TRUE) {
+
+ /*Clear error bits in ISR, write 1 to clear */
+ REG_WRITE (PCI_CSR_BASE, PCI_ISR_OFFSET, PCI_ISR_PSE
+ | PCI_ISR_PFE | PCI_ISR_PPE |
+ PCI_ISR_AHBE);
+ continue;
+ }
+
+ /*A device is present, add an entry to the array */
+ devices[nDevices].bus = bus;
+ devices[nDevices].device = dev;
+ devices[nDevices].func = func;
+
+ pci_read_config_word (dev, PCI_CFG_VENDOR_ID, &data16);
+
+ devices[nDevices].vendor_id = data16;
+
+ pci_read_config_word (dev, PCI_CFG_DEVICE_ID, &data16);
+ devices[nDevices].device_id = data16;
+
+ /*The device is functioning correctly, set error to FALSE */
+ devices[nDevices].error = FALSE;
+
+ /*Figure out what BARs are on this device */
+ sys_pci_bar_info_get (nDevices, bus, dev, func);
+ /*Figure out what INTX# line the card uses */
+ pci_read_config_byte (dev, PCI_CFG_DEV_INT_PIN, &intPin);
+
+ /*assign the appropriate irq line */
+ if (intPin > PCI_IRQ_LINES) {
+ devices[nDevices].error = TRUE;
+ } else if (intPin != 0) {
+ /*This device uses an interrupt line */
+ /*devices[nDevices].irq = ixp425PciIntTranslate[dev][intPin-1]; */
+ devices[nDevices].irq = intPin;
+ }
+#ifdef CONFIG_PCI_SCAN_SHOW
+ printf ("%06d %03d %03d %04d %08d %08x\n", nDevices,
+ devices[nDevices].vendor_id);
+#endif
+ nDevices++;
+
+ }
+
+ calc_bars (memBars, nMBars, IXP425_PCI_BAR_MEM_BASE);
+ sys_pci_device_bars_write ();
+
+ REG_WRITE (PCI_CSR_BASE, PCI_ISR_OFFSET, PCI_ISR_PSE
+ | PCI_ISR_PFE | PCI_ISR_PPE | PCI_ISR_AHBE);
+}
+
+void sys_pci_bar_info_get (unsigned int devnum,
+ unsigned int bus,
+ unsigned int dev, unsigned int func)
+{
+ unsigned int data32;
+ unsigned int tmp;
+ unsigned int size;
+
+ pci_write_config_dword (devnum,
+ PCI_CFG_BASE_ADDRESS_0, IXP425_PCI_BAR_QUERY);
+ pci_read_config_dword (devnum, PCI_CFG_BASE_ADDRESS_0, &data32);
+
+ devices[devnum].bar[0].address = (data32 & 1);
+
+ if (data32 & 1) {
+ /* IO space */
+ tmp = data32 & ~0x3;
+ size = ~(tmp - 1);
+ devices[devnum].bar[0].size = size;
+
+ if (nIOBars < IXP425_PCI_MAX_BAR) {
+ ioBars[nIOBars++] = &devices[devnum].bar[0];
+ }
+ } else {
+ /* Mem space */
+ tmp = data32 & ~IXP425_PCI_BOTTOM_NIBBLE_OF_LONG_MASK;
+ size = ~(tmp - 1);
+ devices[devnum].bar[0].size = size;
+
+ if (nMBars < IXP425_PCI_MAX_BAR) {
+ memBars[nMBars++] = &devices[devnum].bar[0];
+ } else {
+ devices[devnum].error = TRUE;
+ }
+
+ }
+
+ devices[devnum].bar[1].size = 0;
+}
+
+void sortBars (PciBar * Bars[], unsigned int nBars)
+{
+ unsigned int i, j;
+ PciBar *tmp;
+
+ if (nBars == 0) {
+ return;
+ }
+
+ /* Sort biggest to smallest */
+ for (i = 0; i < nBars - 1; i++) {
+ for (j = i + 1; j < nBars; j++) {
+ if (Bars[j]->size > Bars[i]->size) {
+ /* swap them */
+ tmp = Bars[i];
+ Bars[i] = Bars[j];
+ Bars[j] = tmp;
+ }
+ }
+ }
+}
+
+void calc_bars (PciBar * Bars[], unsigned int nBars, unsigned int startAddr)
+{
+ unsigned int i;
+
+ if (nBars == 0) {
+ return;
+ }
+
+ for (i = 0; i < nBars; i++) {
+ Bars[i]->address |= startAddr;
+ startAddr += Bars[i]->size;
+ }
+}
+
+void sys_pci_device_bars_write (void)
+{
+ unsigned int i;
+ int addr;
+
+ for (i = 1; i < nDevices; i++) {
+ if (devices[i].error) {
+ continue;
+ }
+
+ pci_write_config_dword (devices[i].device,
+ PCI_CFG_BASE_ADDRESS_0,
+ devices[i].bar[0].address);
+ addr = BIT (31 - devices[i].device) |
+ (0 << PCI_NP_AD_FUNCSL) |
+ (PCI_CFG_BASE_ADDRESS_0 & ~3);
+ pci_write_config_dword (devices[i].device,
+ PCI_CFG_DEV_INT_LINE, devices[i].irq);
+
+ pci_write_config_word (devices[i].device,
+ PCI_CFG_COMMAND, INITIAL_PCI_CMD);
+
+ }
+}
+
+
+int pci_device_exists (unsigned int deviceNo)
+{
+ unsigned int vendorId;
+ unsigned int regval;
+
+ pci_read_config_dword (deviceNo, PCI_CFG_VENDOR_ID, &vendorId);
+
+ /* There are two ways to find out an empty device.
+ * 1. check Master Abort bit after the access.
+ * 2. check whether the vendor id read back is 0x0.
+ */
+ REG_READ (PCI_CSR_BASE, PCI_ISR_OFFSET, regval);
+ if ((vendorId != 0x0) && ((regval & PCI_ISR_PFE) == 0)) {
+ return TRUE;
+ }
+ /*no device present, make sure that the master abort bit is reset */
+
+ REG_WRITE (PCI_CSR_BASE, PCI_ISR_OFFSET, PCI_ISR_PFE);
+ return FALSE;
+}
+
+pci_dev_t pci_find_devices (struct pci_device_id * ids, int devNo)
+{
+ unsigned int i;
+ unsigned int devdidvid;
+ unsigned int didvid;
+ unsigned int vendorId, deviceId;
+
+ vendorId = ids->vendor;
+ deviceId = ids->device;
+ didvid = ((deviceId << 16) & IXP425_PCI_TOP_WORD_OF_LONG_MASK) |
+ (vendorId & IXP425_PCI_BOTTOM_WORD_OF_LONG_MASK);
+
+ for (i = devNo + 1; i < nDevices; i++) {
+
+ pci_read_config_dword (devices[i].device, PCI_CFG_VENDOR_ID,
+ &devdidvid);
+
+ if (devdidvid == didvid) {
+ return devices[i].device;
+ }
+ }
+ return -1;
+}
generated by cgit v1.1 at 2024-11-25 16:15:31 +0000