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/* SPDX-License-Identifier: GPL-2.0-or-later */
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ops.h>
#include <device/pci_ids.h>
#include <console/console.h>
#include <device/cardbus.h>
#include <delay.h>
#include "rl5c476.h"
#include "chip.h"
static int enable_cf_boot = 0;
static unsigned int cf_base;
static void rl5c476_init(struct device *dev)
{
pc16reg_t *pc16;
unsigned char *base;
/* cardbus controller function 1 for CF Socket */
printk(BIOS_DEBUG, "Ricoh RL5c476: Initializing.\n");
printk(BIOS_DEBUG, "CF Base = %0x\n",cf_base);
/* misc control register */
pci_write_config16(dev,0x82,0x00a0);
/* set up second slot as compact flash port if asked to do so */
if (!enable_cf_boot) {
printk(BIOS_DEBUG, "CF boot not enabled.\n");
return;
}
if (PCI_FUNC(dev->path.pci.devfn) != 1) {
// Only configure if second CF slot.
return;
}
/* make sure isa interrupts are enabled */
pci_write_config16(dev,0x3e,0x0780);
/* pick up where 16 bit card control structure is
* (0x800 bytes into config structure)
*/
base = (unsigned char *)pci_read_config32(dev,0x10);
pc16 = (pc16reg_t *)(base + 0x800);
/* disable memory and io windows and turn off socket power */
pc16->pwctrl = 0;
/* disable irq lines */
pc16->igctrl = 0;
/* disable memory and I/O windows */
pc16->awinen = 0;
/* reset card, configure for I/O and set IRQ line */
pc16->igctrl = 0x69;
/* set io window 0 for 1e0 - 1ef */
/* NOTE: This now sets CF up on a contiguous I/O window of
* 16 bytes, 0x1e0 to 0x1ef.
* Be warned that this is not a standard IDE address as
* automatically detected by the likes of FILO, and would need
* patching to recognize these addresses as an IDE drive.
*
* An earlier version of this driver set up 2 I/O windows to
* emulate the expected addresses for IDE2, however the PCMCIA
* package within Linux then could not re-initialize the
* device as it tried to take control of it. So I believe it is
* easier to patch Filo or the like to pick up this drive
* rather than playing silly games as the kernel tries to
* boot.
*
* Nonetheless, FILO needs a special option enabled to boot
* from this configuration, and it needs to clean up
* afterwards. Please refer to FILO documentation and source
* code for more details.
*/
pc16->iostl0 = 0xe0;
pc16->iosth0 = 1;
pc16->iospl0 = 0xef;
pc16->iosph0 = 1;
pc16->ioffl0 = 0;
pc16->ioffh0 = 0;
/* clear window 1 */
pc16->iostl1 = 0;
pc16->iosth1 = 0;
pc16->iospl1 = 0;
pc16->iosph1 = 0;
pc16->ioffl1 = 0x0;
pc16->ioffh1 = 0;
/* set up CF config window */
pc16->smpga0 = cf_base>>24;
pc16->smsth0 = (cf_base>>20)&0x0f;
pc16->smstl0 = (cf_base>>12)&0xff;
pc16->smsph0 = ((cf_base>>20)&0x0f) | 0x80;
pc16->smspl0 = (cf_base>>12)&0xff;
pc16->moffl0 = 0;
pc16->moffh0 = 0x40;
/* set I/O width for Auto Data width */
pc16->ioctrl = 0x22;
/* enable I/O window 0 and 1 */
pc16->awinen = 0xc1;
pc16->miscc1 = 1;
/* apply power and enable outputs */
pc16->pwctrl = 0xb0;
// delay could be optimised, but this works
udelay(100000);
pc16->igctrl = 0x69;
/* 16 bit CF always have first config byte at 0x200 into
* Config structure, but CF+ may not according to spec -
* should locate through reading tuple data, but this should
* do for now.
*/
unsigned char *cptr;
cptr = (unsigned char *)(cf_base + 0x200);
printk(BIOS_DEBUG, "CF Config = %x\n",*cptr);
/* Set CF to decode 16 IO bytes on any 16 byte boundary -
* rely on the io windows of the bridge set up above to
* map those bytes into the addresses for IDE controller 3
* (0x1e8 - 0x1ef and 0x3ed - 0x3ee)
*/
*cptr = 0x41;
}
static void rl5c476_read_resources(struct device *dev)
{
struct resource *resource;
/* For CF socket we need an extra memory window for
* the control structure of the CF itself
*/
if (enable_cf_boot && (PCI_FUNC(dev->path.pci.devfn) == 1)) {
/* fake index as it isn't in PCI config space */
resource = new_resource(dev, 1);
resource->flags |= IORESOURCE_MEM;
resource->size = 0x1000;
resource->align = resource->gran = 12;
resource->limit= 0xffff0000;
}
cardbus_read_resources(dev);
}
static void rl5c476_set_resources(struct device *dev)
{
struct resource *resource;
printk(BIOS_DEBUG, "%s In set resources\n",dev_path(dev));
if (enable_cf_boot && (PCI_FUNC(dev->path.pci.devfn) == 1)) {
resource = find_resource(dev,1);
if (!(resource->flags & IORESOURCE_STORED)) {
resource->flags |= IORESOURCE_STORED;
printk(BIOS_DEBUG, "%s 1 ==> %llx\n", dev_path(dev), resource->base);
cf_base = resource->base;
}
}
pci_dev_set_resources(dev);
}
static void rl5c476_set_subsystem(struct device *dev, unsigned int vendor,
unsigned int device)
{
u16 miscreg = pci_read_config16(dev, 0x82);
/* Enable subsystem id register writes */
pci_write_config16(dev, 0x82, miscreg | 0x40);
pci_dev_set_subsystem(dev, vendor, device);
/* restore original contents */
pci_write_config16(dev, 0x82, miscreg);
}
static struct pci_operations rl5c476_pci_ops = {
.set_subsystem = rl5c476_set_subsystem,
};
static struct device_operations ricoh_rl5c476_ops = {
.read_resources = rl5c476_read_resources,
.set_resources = rl5c476_set_resources,
.enable_resources = cardbus_enable_resources,
.init = rl5c476_init,
.scan_bus = pci_scan_bridge,
.ops_pci = &rl5c476_pci_ops,
};
static const struct pci_driver ricoh_rl5c476_driver __pci_driver = {
.ops = &ricoh_rl5c476_ops,
.vendor = PCI_VID_RICOH,
.device = PCI_DID_RICOH_RL5C476,
};
static void southbridge_init(struct device *dev)
{
struct southbridge_ricoh_rl5c476_config *conf = dev->chip_info;
enable_cf_boot = conf->enable_cf;
}
struct chip_operations southbridge_ricoh_rl5c476_ops = {
.name = "Ricoh RL5C476 CardBus Controller",
.enable_dev = southbridge_init,
};
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