#include <dm.h>
#include <errno.h>
#include <fdtdec.h>
+#include <pch.h>
#include <pci.h>
+#include <asm/cpu.h>
#include <asm/gpio.h>
#include <asm/io.h>
#include <asm/pci.h>
+DECLARE_GLOBAL_DATA_PTR;
+
#define GPIO_PER_BANK 32
struct ich6_bank_priv {
uint16_t use_sel;
uint16_t io_sel;
uint16_t lvl;
+ u32 lvl_write_cache;
+ bool use_lvl_write_cache;
};
#define GPIO_USESEL_OFFSET(x) (x)
#define GPIO_IOSEL_OFFSET(x) (x + 4)
#define GPIO_LVL_OFFSET(x) (x + 8)
-#define IOPAD_MODE_MASK 0x7
-#define IOPAD_PULL_ASSIGN_SHIFT 7
-#define IOPAD_PULL_ASSIGN_MASK (0x3 << IOPAD_PULL_ASSIGN_SHIFT)
-#define IOPAD_PULL_STRENGTH_SHIFT 9
-#define IOPAD_PULL_STRENGTH_MASK (0x3 << IOPAD_PULL_STRENGTH_SHIFT)
-
-/* TODO: Move this to device tree, or platform data */
-void ich_gpio_set_gpio_map(const struct pch_gpio_map *map)
-{
- gd->arch.gpio_map = map;
-}
-
-static int gpio_ich6_get_base(unsigned long base)
-{
- pci_dev_t pci_dev; /* handle for 0:1f:0 */
- u8 tmpbyte;
- u16 tmpword;
- u32 tmplong;
-
- /* Where should it be? */
- pci_dev = PCI_BDF(0, 0x1f, 0);
-
- /* Is the device present? */
- tmpword = x86_pci_read_config16(pci_dev, PCI_VENDOR_ID);
- if (tmpword != PCI_VENDOR_ID_INTEL) {
- debug("%s: wrong VendorID\n", __func__);
- return -ENODEV;
- }
-
- tmpword = x86_pci_read_config16(pci_dev, PCI_DEVICE_ID);
- debug("Found %04x:%04x\n", PCI_VENDOR_ID_INTEL, tmpword);
- /*
- * We'd like to validate the Device ID too, but pretty much any
- * value is either a) correct with slight differences, or b)
- * correct but undocumented. We'll have to check a bunch of other
- * things instead...
- */
-
- /* I/O should already be enabled (it's a RO bit). */
- tmpword = x86_pci_read_config16(pci_dev, PCI_COMMAND);
- if (!(tmpword & PCI_COMMAND_IO)) {
- debug("%s: device IO not enabled\n", __func__);
- return -ENODEV;
- }
-
- /* Header Type must be normal (bits 6-0 only; see spec.) */
- tmpbyte = x86_pci_read_config8(pci_dev, PCI_HEADER_TYPE);
- if ((tmpbyte & 0x7f) != PCI_HEADER_TYPE_NORMAL) {
- debug("%s: invalid Header type\n", __func__);
- return -ENODEV;
- }
-
- /* Base Class must be a bridge device */
- tmpbyte = x86_pci_read_config8(pci_dev, PCI_CLASS_CODE);
- if (tmpbyte != PCI_CLASS_CODE_BRIDGE) {
- debug("%s: invalid class\n", __func__);
- return -ENODEV;
- }
- /* Sub Class must be ISA */
- tmpbyte = x86_pci_read_config8(pci_dev, PCI_CLASS_SUB_CODE);
- if (tmpbyte != PCI_CLASS_SUB_CODE_BRIDGE_ISA) {
- debug("%s: invalid subclass\n", __func__);
- return -ENODEV;
- }
-
- /* Programming Interface must be 0x00 (no others exist) */
- tmpbyte = x86_pci_read_config8(pci_dev, PCI_CLASS_PROG);
- if (tmpbyte != 0x00) {
- debug("%s: invalid interface type\n", __func__);
- return -ENODEV;
- }
-
- /*
- * GPIOBASE moved to its current offset with ICH6, but prior to
- * that it was unused (or undocumented). Check that it looks
- * okay: not all ones or zeros.
- *
- * Note we don't need check bit0 here, because the Tunnel Creek
- * GPIO base address register bit0 is reserved (read returns 0),
- * while on the Ivybridge the bit0 is used to indicate it is an
- * I/O space.
- */
- tmplong = x86_pci_read_config32(pci_dev, base);
- if (tmplong == 0x00000000 || tmplong == 0xffffffff) {
- debug("%s: unexpected BASE value\n", __func__);
- return -ENODEV;
- }
-
- /*
- * Okay, I guess we're looking at the right device. The actual
- * GPIO registers are in the PCI device's I/O space, starting
- * at the offset that we just read. Bit 0 indicates that it's
- * an I/O address, not a memory address, so mask that off.
- */
- return tmplong & 0xfffc;
-}
-
-static int _ich6_gpio_set_value(uint16_t base, unsigned offset, int value)
+static int _ich6_gpio_set_value(struct ich6_bank_priv *bank, unsigned offset,
+ int value)
{
u32 val;
- val = inl(base);
- if (value)
- val |= (1UL << offset);
+ if (bank->use_lvl_write_cache)
+ val = bank->lvl_write_cache;
else
- val &= ~(1UL << offset);
- outl(val, base);
+ val = inl(bank->lvl);
- return 0;
-}
-
-static int _ich6_gpio_set_function(uint16_t base, unsigned offset, int func)
-{
- u32 val;
-
- if (func) {
- val = inl(base);
+ if (value)
val |= (1UL << offset);
- outl(val, base);
- } else {
- val = inl(base);
+ else
val &= ~(1UL << offset);
- outl(val, base);
- }
+ outl(val, bank->lvl);
+ if (bank->use_lvl_write_cache)
+ bank->lvl_write_cache = val;
return 0;
}
return 0;
}
-static int _gpio_ich6_pinctrl_cfg_pin(s32 gpiobase, s32 iobase, int pin_node)
-{
- u32 gpio_offset[2];
- int pad_offset;
- int val;
- int ret;
- const void *prop;
-
- /*
- * GPIO node is not mandatory, so we only do the
- * pinmuxing if the node exist.
- */
- ret = fdtdec_get_int_array(gd->fdt_blob, pin_node, "gpio-offset",
- gpio_offset, 2);
- if (!ret) {
- /* Do we want to force the GPIO mode? */
- prop = fdt_getprop(gd->fdt_blob, pin_node, "mode-gpio",
- NULL);
- if (prop)
- _ich6_gpio_set_function(GPIO_USESEL_OFFSET
- (gpiobase) +
- gpio_offset[0],
- gpio_offset[1], 1);
-
- val =
- fdtdec_get_int(gd->fdt_blob, pin_node, "direction", -1);
- if (val != -1)
- _ich6_gpio_set_direction(GPIO_IOSEL_OFFSET
- (gpiobase) +
- gpio_offset[0],
- gpio_offset[1], val);
-
- val =
- fdtdec_get_int(gd->fdt_blob, pin_node, "output-value", -1);
- if (val != -1)
- _ich6_gpio_set_value(GPIO_LVL_OFFSET(gpiobase)
- + gpio_offset[0],
- gpio_offset[1], val);
- }
-
- /* if iobase is present, let's configure the pad */
- if (iobase != -1) {
- int iobase_addr;
-
- /*
- * The offset for the same pin for the IOBASE and GPIOBASE are
- * different, so instead of maintaining a lookup table,
- * the device tree should provide directly the correct
- * value for both mapping.
- */
- pad_offset =
- fdtdec_get_int(gd->fdt_blob, pin_node, "pad-offset", -1);
- if (pad_offset == -1) {
- debug("%s: Invalid register io offset %d\n",
- __func__, pad_offset);
- return -EINVAL;
- }
-
- /* compute the absolute pad address */
- iobase_addr = iobase + pad_offset;
-
- /*
- * Do we need to set a specific function mode?
- * If someone put also 'mode-gpio', this option will
- * be just ignored by the controller
- */
- val = fdtdec_get_int(gd->fdt_blob, pin_node, "mode-func", -1);
- if (val != -1)
- clrsetbits_le32(iobase_addr, IOPAD_MODE_MASK, val);
-
- /* Configure the pull-up/down if needed */
- val = fdtdec_get_int(gd->fdt_blob, pin_node, "pull-assign", -1);
- if (val != -1)
- clrsetbits_le32(iobase_addr,
- IOPAD_PULL_ASSIGN_MASK,
- val << IOPAD_PULL_ASSIGN_SHIFT);
-
- val =
- fdtdec_get_int(gd->fdt_blob, pin_node, "pull-strength", -1);
- if (val != -1)
- clrsetbits_le32(iobase_addr,
- IOPAD_PULL_STRENGTH_MASK,
- val << IOPAD_PULL_STRENGTH_SHIFT);
-
- debug("%s: pad cfg [0x%x]: %08x\n", __func__, pad_offset,
- readl(iobase_addr));
- }
-
- return 0;
-}
-
-int gpio_ich6_pinctrl_init(void)
-{
- int pin_node;
- int node;
- int ret;
- int gpiobase;
- int iobase_offset;
- int iobase = -1;
-
- /*
- * Get the memory/io base address to configure every pins.
- * IOBASE is used to configure the mode/pads
- * GPIOBASE is used to configure the direction and default value
- */
- gpiobase = gpio_ich6_get_base(PCI_CFG_GPIOBASE);
- if (gpiobase < 0) {
- debug("%s: invalid GPIOBASE address (%08x)\n", __func__,
- gpiobase);
- return -EINVAL;
- }
-
- /* This is not an error to not have a pinctrl node */
- node =
- fdtdec_next_compatible(gd->fdt_blob, 0, COMPAT_INTEL_X86_PINCTRL);
- if (node <= 0) {
- debug("%s: no pinctrl node\n", __func__);
- return 0;
- }
-
- /*
- * Get the IOBASE, this is not mandatory as this is not
- * supported by all the CPU
- */
- iobase_offset = fdtdec_get_int(gd->fdt_blob, node, "io-base", -1);
- if (iobase_offset == -1) {
- debug("%s: io-base offset not present\n", __func__);
- } else {
- iobase = gpio_ich6_get_base(iobase_offset);
- if (iobase < 0) {
- debug("%s: invalid IOBASE address (%08x)\n", __func__,
- iobase);
- return -EINVAL;
- }
- }
-
- for (pin_node = fdt_first_subnode(gd->fdt_blob, node);
- pin_node > 0;
- pin_node = fdt_next_subnode(gd->fdt_blob, pin_node)) {
- /* Configure the pin */
- ret = _gpio_ich6_pinctrl_cfg_pin(gpiobase, iobase, pin_node);
- if (ret != 0) {
- debug("%s: invalid configuration for the pin %d\n",
- __func__, pin_node);
- return ret;
- }
- }
-
- return 0;
-}
-
static int gpio_ich6_ofdata_to_platdata(struct udevice *dev)
{
struct ich6_bank_platdata *plat = dev_get_platdata(dev);
- u16 gpiobase;
+ u32 gpiobase;
int offset;
+ int ret;
+
+ ret = pch_get_gpio_base(dev->parent, &gpiobase);
+ if (ret)
+ return ret;
- gpiobase = gpio_ich6_get_base(PCI_CFG_GPIOBASE);
- offset = fdtdec_get_int(gd->fdt_blob, dev->of_offset, "reg", -1);
+ offset = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev), "reg", -1);
if (offset == -1) {
debug("%s: Invalid register offset %d\n", __func__, offset);
return -EINVAL;
}
+ plat->offset = offset;
plat->base_addr = gpiobase + offset;
- plat->bank_name = fdt_getprop(gd->fdt_blob, dev->of_offset,
+ plat->bank_name = fdt_getprop(gd->fdt_blob, dev_of_offset(dev),
"bank-name", NULL);
return 0;
struct ich6_bank_platdata *plat = dev_get_platdata(dev);
struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
struct ich6_bank_priv *bank = dev_get_priv(dev);
-
- if (gd->arch.gpio_map) {
- setup_pch_gpios(plat->base_addr, gd->arch.gpio_map);
- gd->arch.gpio_map = NULL;
- }
+ const void *prop;
uc_priv->gpio_count = GPIO_PER_BANK;
uc_priv->bank_name = plat->bank_name;
bank->io_sel = plat->base_addr + 4;
bank->lvl = plat->base_addr + 8;
+ prop = fdt_getprop(gd->fdt_blob, dev_of_offset(dev),
+ "use-lvl-write-cache", NULL);
+ if (prop)
+ bank->use_lvl_write_cache = true;
+ else
+ bank->use_lvl_write_cache = false;
+ bank->lvl_write_cache = 0;
+
return 0;
}
{
struct ich6_bank_priv *bank = dev_get_priv(dev);
- return _ich6_gpio_set_direction(inl(bank->io_sel), offset, 0);
+ return _ich6_gpio_set_direction(bank->io_sel, offset, 0);
}
static int ich6_gpio_direction_output(struct udevice *dev, unsigned offset,
int ret;
struct ich6_bank_priv *bank = dev_get_priv(dev);
- ret = _ich6_gpio_set_direction(inl(bank->io_sel), offset, 1);
+ ret = _ich6_gpio_set_direction(bank->io_sel, offset, 1);
if (ret)
return ret;
- return _ich6_gpio_set_value(bank->lvl, offset, value);
+ return _ich6_gpio_set_value(bank, offset, value);
}
static int ich6_gpio_get_value(struct udevice *dev, unsigned offset)
int r;
tmplong = inl(bank->lvl);
+ if (bank->use_lvl_write_cache)
+ tmplong |= bank->lvl_write_cache;
r = (tmplong & (1UL << offset)) ? 1 : 0;
return r;
}
int value)
{
struct ich6_bank_priv *bank = dev_get_priv(dev);
- return _ich6_gpio_set_value(bank->lvl, offset, value);
+ return _ich6_gpio_set_value(bank, offset, value);
}
static int ich6_gpio_get_function(struct udevice *dev, unsigned offset)
projects / people / ms / u-boot.git / blobdiff