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Date: Mon, 4 Feb 2008 15:18:03 -0500
From: Philip Langdale <philipl@...rt.org>
To: Frank Seidel <fseidel@...e.de>
Cc: sdhci-devel@...t.drzeus.cx, linux-kernel@...r.kernel.org,
Pierre Ossman <drzeus@...eus.cx>,
Andrew de Quincey <adq_dvb@...skialf.net>
Subject: Re: [PATCH v2] mmc: extend ricoh_mmc to support Ricoh RL5c476
On Mon, 4 Feb 2008 19:25:42 +0100, Frank Seidel <fseidel@...e.de> wrote:
> From: Frank Seidel <fseidel@...e.de>
>
> This patch (base on current linus git tree plus Philip Langdales
> suspend/resume patch) adds support for the Ricoh RL5c476 chip:
> with this the mmc adapter that needs this disabler (R5C843) can
> also be handled correctly when it sits on a RL5c476.
> (+ minor style changes (removed spaces between function names
> and open parenthesis .. checkpatch warned from previos patch))
>
> Signed-off-by: Frank Seidel <fseidel@...e.de>
> ---
> drivers/mmc/host/ricoh_mmc.c | 101
> ++++++++++++++++++++++++++++++++++---------
> 1 file changed, 80 insertions(+), 21 deletions(-)
>
> --- a/drivers/mmc/host/ricoh_mmc.c
> +++ b/drivers/mmc/host/ricoh_mmc.c
> @@ -44,19 +44,43 @@ MODULE_DEVICE_TABLE(pci, pci_ids);
> static int ricoh_mmc_disable(struct pci_dev *fw_dev)
> {
> u8 write_enable;
> + u8 write_target;
> u8 disable;
>
> - pci_read_config_byte(fw_dev, 0xCB, &disable);
> - if (disable & 0x02) {
> - printk(KERN_INFO DRIVER_NAME
> - ": Controller already disabled. Nothing to do.\n");
> - return -ENODEV;
> - }
> + if (fw_dev->device == PCI_DEVICE_ID_RICOH_RL5C476) {
> + /* via RL5C476 */
> +
> + pci_read_config_byte(fw_dev, 0xB7, &disable);
> + if (disable & 0x02) {
> + printk(KERN_INFO DRIVER_NAME
> + ": Controller already disabled. " \
> + "Nothing to do.\n");
> + return -ENODEV;
> + }
> +
> + pci_read_config_byte(fw_dev, 0x8E, &write_enable);
> + pci_write_config_byte(fw_dev, 0x8E, 0xAA);
> + pci_read_config_byte(fw_dev, 0x8D, &write_target);
> + pci_write_config_byte(fw_dev, 0x8D, 0xB7);
> + pci_write_config_byte(fw_dev, 0xB7, disable | 0x02);
> + pci_write_config_byte(fw_dev, 0x8E, write_enable);
> + pci_write_config_byte(fw_dev, 0x8D, write_target);
> + } else {
> + /* via R5C832 */
> +
> + pci_read_config_byte(fw_dev, 0xCB, &disable);
> + if (disable & 0x02) {
> + printk(KERN_INFO DRIVER_NAME
> + ": Controller already disabled. " \
> + "Nothing to do.\n");
> + return -ENODEV;
> + }
>
> - pci_read_config_byte(fw_dev, 0xCA, &write_enable);
> - pci_write_config_byte(fw_dev, 0xCA, 0x57);
> - pci_write_config_byte(fw_dev, 0xCB, disable | 0x02);
> - pci_write_config_byte(fw_dev, 0xCA, write_enable);
> + pci_read_config_byte(fw_dev, 0xCA, &write_enable);
> + pci_write_config_byte(fw_dev, 0xCA, 0x57);
> + pci_write_config_byte(fw_dev, 0xCB, disable | 0x02);
> + pci_write_config_byte(fw_dev, 0xCA, write_enable);
> + }
>
> printk(KERN_INFO DRIVER_NAME
> ": Controller is now disabled.\n");
> @@ -67,13 +91,29 @@ static int ricoh_mmc_disable(struct pci_
> static int ricoh_mmc_enable(struct pci_dev *fw_dev)
> {
> u8 write_enable;
> + u8 write_target;
> u8 disable;
>
> - pci_read_config_byte(fw_dev, 0xCA, &write_enable);
> - pci_read_config_byte(fw_dev, 0xCB, &disable);
> - pci_write_config_byte(fw_dev, 0xCA, 0x57);
> - pci_write_config_byte(fw_dev, 0xCB, disable & ~0x02);
> - pci_write_config_byte(fw_dev, 0xCA, write_enable);
> + if (fw_dev->device == PCI_DEVICE_ID_RICOH_RL5C476) {
> + /* via RL5C476 */
> +
> + pci_read_config_byte(fw_dev, 0x8E, &write_enable);
> + pci_write_config_byte(fw_dev, 0x8E, 0xAA);
> + pci_read_config_byte(fw_dev, 0x8D, &write_target);
> + pci_write_config_byte(fw_dev, 0x8D, 0xB7);
> + pci_read_config_byte(fw_dev, 0xB7, &disable);
> + pci_write_config_byte(fw_dev, 0xB7, disable & ~0x02);
> + pci_write_config_byte(fw_dev, 0x8E, write_enable);
> + pci_write_config_byte(fw_dev, 0x8D, write_target);
> + } else {
> + /* via R5C832 */
> +
> + pci_read_config_byte(fw_dev, 0xCA, &write_enable);
> + pci_read_config_byte(fw_dev, 0xCB, &disable);
> + pci_write_config_byte(fw_dev, 0xCA, 0x57);
> + pci_write_config_byte(fw_dev, 0xCB, disable & ~0x02);
> + pci_write_config_byte(fw_dev, 0xCA, write_enable);
> + }
>
> printk(KERN_INFO DRIVER_NAME
> ": Controller is now re-enabled.\n");
> @@ -85,6 +125,7 @@ static int __devinit ricoh_mmc_probe(str
> const struct pci_device_id *ent)
> {
> u8 rev;
> + u8 ctrlfound = 0;
>
> struct pci_dev *fw_dev = NULL;
>
> @@ -98,20 +139,38 @@ static int __devinit ricoh_mmc_probe(str
> pci_name(pdev), (int)pdev->vendor, (int)pdev->device,
> (int)rev);
>
> - while ((fw_dev = pci_get_device(PCI_VENDOR_ID_RICOH,
> PCI_DEVICE_ID_RICOH_R5C832, fw_dev))) {
> + while ((fw_dev =
> + pci_get_device(PCI_VENDOR_ID_RICOH,
> + PCI_DEVICE_ID_RICOH_RL5C476, fw_dev))) {
> if (PCI_SLOT(pdev->devfn) == PCI_SLOT(fw_dev->devfn) &&
> pdev->bus == fw_dev->bus) {
> - if (ricoh_mmc_disable(fw_dev) != 0) {
> + if (ricoh_mmc_disable(fw_dev) != 0)
> return -ENODEV;
> - }
>
> pci_set_drvdata(pdev, fw_dev);
>
> + ++ctrlfound;
> break;
> }
> }
>
> - if (pci_get_drvdata(pdev) == NULL) {
> + fw_dev = NULL;
> +
> + while (!ctrlfound &&
> + (fw_dev = pci_get_device(PCI_VENDOR_ID_RICOH,
> + PCI_DEVICE_ID_RICOH_R5C832, fw_dev))) {
> + if (PCI_SLOT(pdev->devfn) == PCI_SLOT(fw_dev->devfn) &&
> + pdev->bus == fw_dev->bus) {
> + if (ricoh_mmc_disable(fw_dev) != 0)
> + return -ENODEV;
> +
> + pci_set_drvdata(pdev, fw_dev);
> +
> + ++ctrlfound;
> + }
> + }
> +
> + if (!ctrlfound) {
> printk(KERN_WARNING DRIVER_NAME
> ": Main firewire function not found. Cannot disable
> controller.\n");
> return -ENODEV;
> @@ -132,7 +191,7 @@ static void __devexit ricoh_mmc_remove(s
> pci_set_drvdata(pdev, NULL);
> }
>
> -static int ricoh_mmc_suspend (struct pci_dev *pdev, pm_message_t state)
> +static int ricoh_mmc_suspend(struct pci_dev *pdev, pm_message_t state)
> {
> struct pci_dev *fw_dev = NULL;
>
> @@ -146,7 +205,7 @@ static int ricoh_mmc_suspend (struct pci
> return 0;
> }
>
> -static int ricoh_mmc_resume (struct pci_dev *pdev)
> +static int ricoh_mmc_resume(struct pci_dev *pdev)
> {
> struct pci_dev *fw_dev = NULL;
ACK.
Hopefully Pierre will re-emerge soon to accept this into his tree.
--phil
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