[U-Boot] [PATCH v4] pci_ftpci100: Implementation FTPCI100 PCI driver
Macpaul Lin
macpaul at andestech.com
Tue Nov 29 07:59:00 CET 2011
From: Gavin Guo <gavinguo at andestech.com>
FTPCI100 is a SoC PCI componenet of Faraday company.
Which is usually built into SoC chips for providing
embedded PCI functions.
Signed-off-by: Gavin Guo <gavinguo at andestech.com>
Signed-off-by: Macpaul Lin <macpaul at andestech.com>
---
Changes for v2:
- clean up lines over 80 charaters.
- fix static functions.
- fix the oder of include headers.
Changes for v3:
- fix incorrect malloc assignment to priv strcuture.
- fix pci_set_region related configurations.
- remove useless probe function.
- remove useless __io.
- indent comment to correct format.
- add static to internal functions.
- drop the CONFIG_FTPCI100_DEBUG
- fix priv->ndevs++ in bus_scan function by dropping
define CONFIG_FTPCI100_DEBUG
Changes for v4:
- Update version number only since the e-mail server seems
didn't send out mail correctly.
drivers/pci/Makefile | 1 +
drivers/pci/pci_ftpci100.c | 330 ++++++++++++++++++++++++++++++++++++++++++++
drivers/pci/pci_ftpci100.h | 94 +++++++++++++
3 files changed, 425 insertions(+), 0 deletions(-)
create mode 100644 drivers/pci/pci_ftpci100.c
create mode 100644 drivers/pci/pci_ftpci100.h
diff --git a/drivers/pci/Makefile b/drivers/pci/Makefile
index ee0c64d..1ae35d3 100644
--- a/drivers/pci/Makefile
+++ b/drivers/pci/Makefile
@@ -27,6 +27,7 @@ LIB := $(obj)libpci.o
COBJS-$(CONFIG_FSL_PCI_INIT) += fsl_pci_init.o
COBJS-$(CONFIG_PCI) += pci.o pci_auto.o pci_indirect.o
+COBJS-$(CONFIG_FTPCI100) += pci_ftpci100.o
COBJS-$(CONFIG_IXP_PCI) += pci_ixp.o
COBJS-$(CONFIG_SH4_PCI) += pci_sh4.o
COBJS-$(CONFIG_SH7751_PCI) +=pci_sh7751.o
diff --git a/drivers/pci/pci_ftpci100.c b/drivers/pci/pci_ftpci100.c
new file mode 100644
index 0000000..a795a97
--- /dev/null
+++ b/drivers/pci/pci_ftpci100.c
@@ -0,0 +1,330 @@
+/*
+ * Faraday FTPCI100 PCI Bridge Controller Device Driver Implementation
+ *
+ * Copyright (C) 2011 Andes Technology Corporation
+ * Gavin Guo, Andes Technology Corporation <gavinguo at andestech.com>
+ * Macpaul Lin, Andes Technology Corporation <macpaul at andestech.com>
+ *
+ * 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 <malloc.h>
+#include <pci.h>
+
+#include <asm/io.h>
+#include <asm/types.h> /* u32, u16.... used by pci.h */
+
+#include "pci_ftpci100.h"
+
+struct ftpci100_data {
+ unsigned int reg_base;
+ unsigned int io_base;
+ unsigned int mem_base;
+ unsigned int mmio_base;
+ unsigned int ndevs;
+};
+
+static struct pci_config devs[FTPCI100_MAX_FUNCTIONS];
+static struct pci_controller local_hose;
+
+static void setup_pci_bar(unsigned int bus, unsigned int dev, unsigned func,
+ unsigned char header, struct ftpci100_data *priv)
+{
+ struct pci_controller *hose = (struct pci_controller *)&local_hose;
+ unsigned int i, tmp32, bar_no, iovsmem = 1;
+ pci_dev_t dev_nu;
+
+ /* A device is present, add an entry to the array */
+ devs[priv->ndevs].bus = bus;
+ devs[priv->ndevs].dev = dev;
+ devs[priv->ndevs].func = func;
+
+ dev_nu = PCI_BDF(bus, dev, func);
+
+ if ((header & 0x7f) == 0x01)
+ /* PCI-PCI Bridge */
+ bar_no = 2;
+ else
+ bar_no = 6;
+
+ /* Allocate address spaces by configuring BARs */
+ for (i = 0; i < bar_no; i++) {
+ pci_hose_write_config_dword(hose, dev_nu,
+ PCI_BASE_ADDRESS_0 + i * 4, 0xffffffff);
+ pci_hose_read_config_dword(hose, dev_nu,
+ PCI_BASE_ADDRESS_0 + i * 4, &tmp32);
+
+ if (tmp32 == 0x0)
+ continue;
+
+ /* IO space */
+ if (tmp32 & 0x1) {
+ iovsmem = 0;
+ unsigned int size_mask = ~(tmp32 & 0xfffffffc);
+
+ if (priv->io_base & size_mask)
+ priv->io_base = (priv->io_base & ~size_mask) + \
+ size_mask + 1;
+
+ devs[priv->ndevs].bar[i].addr = priv->io_base;
+ devs[priv->ndevs].bar[i].size = size_mask + 1;
+
+ pci_hose_write_config_dword(hose, dev_nu,
+ PCI_BASE_ADDRESS_0 + i * 4,
+ priv->io_base);
+
+ debug("Allocated IO address 0x%X-" \
+ "0x%X for Bus %d, Device %d, Function %d\n",
+ priv->io_base,
+ priv->io_base + size_mask, bus, dev, func);
+
+ priv->io_base += size_mask + 1;
+ } else {
+ /* Memory space */
+ unsigned int is_64bit = ((tmp32 & 0x6) == 0x4);
+ unsigned int is_pref = tmp32 & 0x8;
+ unsigned int size_mask = ~(tmp32 & 0xfffffff0);
+ unsigned int alloc_base;
+ unsigned int *addr_mem_base;
+
+ if (is_pref)
+ addr_mem_base = &priv->mem_base;
+ else
+ addr_mem_base = &priv->mmio_base;
+
+ alloc_base = *addr_mem_base;
+
+ if (alloc_base & size_mask)
+ alloc_base = (alloc_base & ~size_mask) \
+ + size_mask + 1;
+
+ pci_hose_write_config_dword(hose, dev_nu,
+ PCI_BASE_ADDRESS_0 + i * 4, alloc_base);
+
+ debug("Allocated %s address 0x%X-" \
+ "0x%X for Bus %d, Device %d, Function %d\n",
+ is_pref ? "MEM" : "MMIO", alloc_base,
+ alloc_base + size_mask, bus, dev, func);
+
+ devs[priv->ndevs].bar[i].addr = alloc_base;
+ devs[priv->ndevs].bar[i].size = size_mask + 1;
+
+ debug("BAR address BAR size\n");
+ debug("%010x %08d\n",
+ devs[priv->ndevs].bar[0].addr,
+ devs[priv->ndevs].bar[0].size);
+
+ alloc_base += size_mask + 1;
+ *addr_mem_base = alloc_base;
+
+ if (is_64bit) {
+ i++;
+ pci_hose_write_config_dword(hose, dev_nu,
+ PCI_BASE_ADDRESS_0 + i * 4, 0x0);
+ }
+ }
+ }
+
+ /* Enable Bus Master, Memory Space, and IO Space */
+ pci_hose_read_config_dword(hose, dev_nu, PCI_CACHE_LINE_SIZE, &tmp32);
+ pci_hose_write_config_dword(hose, dev_nu, PCI_CACHE_LINE_SIZE, 0x08);
+ pci_hose_read_config_dword(hose, dev_nu, PCI_CACHE_LINE_SIZE, &tmp32);
+
+ pci_hose_read_config_dword(hose, dev_nu, PCI_COMMAND, &tmp32);
+
+ tmp32 &= 0xffff;
+
+ if (iovsmem == 0)
+ tmp32 |= 0x5;
+ else
+ tmp32 |= 0x6;
+
+ pci_hose_write_config_dword(hose, dev_nu, PCI_COMMAND, tmp32);
+}
+
+static void pci_bus_scan(struct ftpci100_data *priv)
+{
+ struct pci_controller *hose = (struct pci_controller *)&local_hose;
+ unsigned int bus, dev, func;
+ pci_dev_t dev_nu;
+ unsigned int data32;
+ unsigned int tmp;
+ unsigned char header;
+ unsigned char int_pin;
+ unsigned int niobars;
+ unsigned int nmbars;
+
+ priv->ndevs = 1;
+
+ nmbars = 0;
+ niobars = 0;
+
+ for (bus = 0; bus < MAX_BUS_NUM; bus++)
+ for (dev = 0; dev < MAX_DEV_NUM; dev++)
+ for (func = 0; func < MAX_FUN_NUM; func++) {
+ dev_nu = PCI_BDF(bus, dev, func);
+ pci_hose_read_config_dword(hose, dev_nu,
+ PCI_VENDOR_ID, &data32);
+
+ /*
+ * some broken boards return 0 or ~0,
+ * if a slot is empty.
+ */
+ if (data32 == 0xffffffff ||
+ data32 == 0x00000000 ||
+ data32 == 0x0000ffff ||
+ data32 == 0xffff0000)
+ continue;
+
+ pci_hose_read_config_dword(hose, dev_nu,
+ PCI_HEADER_TYPE, &tmp);
+ header = (unsigned char)tmp;
+ setup_pci_bar(bus, dev, func, header, priv);
+
+ devs[priv->ndevs].v_id = (u16)(data32 & \
+ 0x0000ffff);
+
+ devs[priv->ndevs].d_id = (u16)((data32 & \
+ 0xffff0000) >> 16);
+
+ /* Figure out what INTX# line the card uses */
+ pci_hose_read_config_byte(hose, dev_nu,
+ PCI_INTERRUPT_PIN, &int_pin);
+
+ /* assign the appropriate irq line */
+ if (int_pin > PCI_IRQ_LINES) {
+ printf("more irq lines than expect\n");
+ } else if (int_pin != 0) {
+ /* This device uses an interrupt line */
+ devs[priv->ndevs].pin = int_pin;
+ }
+
+ pci_hose_read_config_dword(hose, dev_nu,
+ PCI_CLASS_DEVICE, &data32);
+
+ debug("%06d %03d %03d " \
+ "%04d %08x %08x " \
+ "%03d %08x %06d %08x\n",
+ priv->ndevs, devs[priv->ndevs].bus,
+ devs[priv->ndevs].dev,
+ devs[priv->ndevs].func,
+ devs[priv->ndevs].d_id,
+ devs[priv->ndevs].v_id,
+ devs[priv->ndevs].pin,
+ devs[priv->ndevs].bar[0].addr,
+ devs[priv->ndevs].bar[0].size,
+ data32 >> 8);
+
+ priv->ndevs++;
+ }
+}
+
+static void ftpci_preinit(struct ftpci100_data *priv)
+{
+ struct ftpci100_ahbc *ftpci100;
+ struct pci_controller *hose = (struct pci_controller *)&local_hose;
+ u32 pci_config_addr;
+ u32 pci_config_data;
+
+ priv->reg_base = CONFIG_FTPCI100_BASE;
+ priv->io_base = CONFIG_FTPCI100_BASE + CONFIG_FTPCI100_IO_SIZE;
+ priv->mmio_base = CONFIG_FTPCI100_MEM_BASE;
+ priv->mem_base = CONFIG_FTPCI100_MEM_BASE + CONFIG_FTPCI100_MEM_SIZE;
+
+ ftpci100 = (struct ftpci100_ahbc *)priv->reg_base;
+
+ pci_config_addr = (u32) &ftpci100->conf;
+ pci_config_data = (u32) &ftpci100->data;
+
+ /* print device name */
+ printf("FTPCI100\n");
+
+ /* dump basic configuration */
+ debug("%s: Config addr is %08X, data port is %08X\n",
+ __func__, pci_config_addr, pci_config_data);
+
+ /* PCI memory space */
+ pci_set_region(hose->regions + 0,
+ CONFIG_PCI_MEM_BUS,
+ CONFIG_PCI_MEM_PHYS,
+ CONFIG_PCI_MEM_SIZE,
+ PCI_REGION_MEM);
+ hose->region_count++;
+
+ /* PCI IO space */
+ pci_set_region(hose->regions + 1,
+ CONFIG_PCI_IO_BUS,
+ CONFIG_PCI_IO_PHYS,
+ CONFIG_PCI_IO_SIZE,
+ PCI_REGION_IO);
+ hose->region_count++;
+
+#if defined(CONFIG_PCI_SYS_BUS)
+ /* PCI System Memory space */
+ pci_set_region(hose->regions + 2,
+ CONFIG_PCI_SYS_BUS,
+ CONFIG_PCI_SYS_PHYS,
+ CONFIG_PCI_SYS_SIZE,
+ PCI_REGION_MEM | PCI_REGION_SYS_MEMORY);
+ hose->region_count++;
+#endif
+
+ /* setup indirect read/write function */
+ pci_setup_indirect(hose, pci_config_addr, pci_config_data);
+
+ /* register hose */
+ pci_register_hose(hose);
+}
+
+void pci_ftpci_init(void)
+{
+ struct ftpci100_data *priv = NULL;
+ struct pci_controller *hose = (struct pci_controller *)&local_hose;
+ pci_dev_t bridge_num;
+
+ struct pci_device_id bridge_ids[] = {
+ {FTPCI100_BRIDGE_VENDORID, FTPCI100_BRIDGE_DEVICEID},
+ {0, 0}
+ };
+
+ priv = malloc(sizeof(struct ftpci100_data));
+
+ if (!priv) {
+ printf("%s(): failed to malloc priv\n", __func__);
+ return;
+ }
+
+ memset(priv, 0, sizeof(struct ftpci100_data));
+
+ ftpci_preinit(priv);
+
+ debug("Device bus dev func deviceID vendorID pin address" \
+ " size class\n");
+
+ pci_bus_scan(priv);
+
+ /*
+ * Setup the PCI Bridge Window to 1GB,
+ * it will cause USB OHCI Host controller Unrecoverable Error
+ * if it is not set.
+ */
+ bridge_num = pci_find_devices(bridge_ids, 0);
+ if (bridge_num == -1) {
+ printf("PCI Bridge not found\n");
+ return;
+ }
+ pci_hose_write_config_dword(hose, bridge_num, PCI_MEM_BASE_SIZE1,
+ FTPCI100_BASE_ADR_SIZE(1024));
+}
diff --git a/drivers/pci/pci_ftpci100.h b/drivers/pci/pci_ftpci100.h
new file mode 100644
index 0000000..19c81a8
--- /dev/null
+++ b/drivers/pci/pci_ftpci100.h
@@ -0,0 +1,94 @@
+/*
+ * Faraday FTPCI100 PCI Bridge Controller Device Driver Implementation
+ *
+ * Copyright (C) 2010 Andes Technology Corporation
+ * Gavin Guo, Andes Technology Corporation <gavinguo at andestech.com>
+ * Macpaul Lin, Andes Technology Corporation <macpaul at andestech.com>
+ *
+ * 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
+ */
+
+#ifndef __FTPCI100_H
+#define __FTPCI100_H
+
+/* AHB Control Registers */
+struct ftpci100_ahbc {
+ unsigned int iosize; /* 0x00 - I/O Space Size Signal */
+ unsigned int prot; /* 0x04 - AHB Protection */
+ unsigned int rsved[8]; /* 0x08-0x24 - Reserved */
+ unsigned int conf; /* 0x28 - PCI Configuration */
+ unsigned int data; /* 0x2c - PCI Configuration DATA */
+};
+
+/*
+ * FTPCI100_IOSIZE_REG's constant definitions
+ */
+#define FTPCI100_BASE_IO_SIZE(x) (ffs(x) - 1) /* 1M - 2048M */
+
+/*
+ * PCI Configuration Register
+ */
+#define PCI_INT_MASK 0x4c
+#define PCI_MEM_BASE_SIZE1 0x50
+#define PCI_MEM_BASE_SIZE2 0x54
+#define PCI_MEM_BASE_SIZE3 0x58
+
+/*
+ * PCI_INT_MASK's bit definitions
+ */
+#define PCI_INTA_ENABLE (1 << 22)
+#define PCI_INTB_ENABLE (1 << 23)
+#define PCI_INTC_ENABLE (1 << 24)
+#define PCI_INTD_ENABLE (1 << 25)
+
+/*
+ * PCI_MEM_BASE_SIZE1's constant definitions
+ */
+#define FTPCI100_BASE_ADR_SIZE(x) ((ffs(x) - 1) << 16) /* 1M - 2048M */
+
+#define FTPCI100_MAX_FUNCTIONS 20
+#define PCI_IRQ_LINES 4
+
+#define MAX_BUS_NUM 256
+#define MAX_DEV_NUM 32
+#define MAX_FUN_NUM 8
+
+#define PCI_MAX_BAR_PER_FUNC 6
+
+/*
+ * PCI_MEM_SIZE
+ */
+#define FTPCI100_MEM_SIZE(x) (ffs(x) << 24)
+
+/* This definition is used by pci_ftpci_init() */
+#define FTPCI100_BRIDGE_VENDORID 0x159b
+#define FTPCI100_BRIDGE_DEVICEID 0x4321
+
+struct pcibar {
+ unsigned int size;
+ unsigned int addr;
+};
+
+struct pci_config {
+ unsigned int bus;
+ unsigned int dev; /* device */
+ unsigned int func;
+ unsigned int pin;
+ unsigned short v_id; /* vendor id */
+ unsigned short d_id; /* device id */
+ struct pcibar bar[PCI_MAX_BAR_PER_FUNC + 1];
+};
+
+#endif
--
1.7.3.5
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