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[PATCH] pcmcia: at91_cf update

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This is an update to the AT91 CompactFlash driver.

We replace the hard-coded "chip select 4" with the chip-select value
passed via platform_data.  The configuration of the EBI memory
controller to enable Compact Flash access is now also handled in the
platform setup code and not in the driver.

Signed-off-by: Andrew Victor <andrew@sanpeople.com>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
This commit is contained in:
Andrew Victor 2006-12-04 12:26:36 +02:00 committed by Dominik Brodowski
parent 1dd997f8fa
commit 40a0017eb8
1 changed files with 3 additions and 32 deletions
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35
drivers/pcmcia/at91_cf.c
View file

@ -157,9 +157,8 @@ static int at91_cf_set_io_map(struct pcmcia_socket *s, struct pccard_io_map *io)
/*
* Use 16 bit accesses unless/until we need 8-bit i/o space.
* Always set CSR4 ... PCMCIA won't always unmap things.
*/
csr = at91_sys_read(AT91_SMC_CSR(4)) & ~AT91_SMC_DBW;
csr = at91_sys_read(AT91_SMC_CSR(cf->board->chipselect)) & ~AT91_SMC_DBW;
/*
* NOTE: this CF controller ignores IOIS16, so we can't really do
@ -178,7 +177,7 @@ static int at91_cf_set_io_map(struct pcmcia_socket *s, struct pccard_io_map *io)
csr |= AT91_SMC_DBW_16;
pr_debug("%s: 16bit i/o bus\n", driver_name);
}
at91_sys_write(AT91_SMC_CSR(4), csr);
at91_sys_write(AT91_SMC_CSR(cf->board->chipselect), csr);
io->start = cf->socket.io_offset;
io->stop = io->start + SZ_2K - 1;
@ -222,7 +221,6 @@ static int __init at91_cf_probe(struct platform_device *pdev)
struct at91_cf_socket *cf;
struct at91_cf_data *board = pdev->dev.platform_data;
struct resource *io;
unsigned int csa;
int status;
if (!board || !board->det_pin || !board->rst_pin)
@ -241,28 +239,6 @@ static int __init at91_cf_probe(struct platform_device *pdev)
cf->phys_baseaddr = io->start;
platform_set_drvdata(pdev, cf);
/* CF takes over CS4, CS5, CS6 */
csa = at91_sys_read(AT91_EBI_CSA);
at91_sys_write(AT91_EBI_CSA, csa | AT91_EBI_CS4A_SMC_COMPACTFLASH);
/* nWAIT is _not_ a default setting */
(void) at91_set_A_periph(AT91_PIN_PC6, 1); /* nWAIT */
/*
* Static memory controller timing adjustments.
* REVISIT: these timings are in terms of MCK cycles, so
* when MCK changes (cpufreq etc) so must these values...
*/
at91_sys_write(AT91_SMC_CSR(4),
AT91_SMC_ACSS_STD
| AT91_SMC_DBW_16
| AT91_SMC_BAT
| AT91_SMC_WSEN
| AT91_SMC_NWS_(32) /* wait states */
| AT91_SMC_RWSETUP_(6) /* setup time */
| AT91_SMC_RWHOLD_(4) /* hold time */
);
/* must be a GPIO; ergo must trigger on both edges */
status = request_irq(board->det_pin, at91_cf_irq, 0, driver_name, cf);
if (status < 0)
@ -291,7 +267,7 @@ static int __init at91_cf_probe(struct platform_device *pdev)
goto fail1;
}
/* reserve CS4, CS5, and CS6 regions; but use just CS4 */
/* reserve chip-select regions */
if (!request_mem_region(io->start, io->end + 1 - io->start,
driver_name)) {
status = -ENXIO;
@ -327,7 +303,6 @@ fail0a:
device_init_wakeup(&pdev->dev, 0);
free_irq(board->det_pin, cf);
fail0:
at91_sys_write(AT91_EBI_CSA, csa);
kfree(cf);
return status;
}
@ -337,7 +312,6 @@ static int __exit at91_cf_remove(struct platform_device *pdev)
struct at91_cf_socket *cf = platform_get_drvdata(pdev);
struct at91_cf_data *board = cf->board;
struct resource *io = cf->socket.io[0].res;
unsigned int csa;
pcmcia_unregister_socket(&cf->socket);
if (board->irq_pin)
@ -347,9 +321,6 @@ static int __exit at91_cf_remove(struct platform_device *pdev)
iounmap((void __iomem *) cf->socket.io_offset);
release_mem_region(io->start, io->end + 1 - io->start);
csa = at91_sys_read(AT91_EBI_CSA);
at91_sys_write(AT91_EBI_CSA, csa & ~AT91_EBI_CS4A);
kfree(cf);
return 0;
}