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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/pcmcia/sa1100_neponset.c | |
download | linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.bz2 |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'drivers/pcmcia/sa1100_neponset.c')
-rw-r--r-- | drivers/pcmcia/sa1100_neponset.c | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/drivers/pcmcia/sa1100_neponset.c b/drivers/pcmcia/sa1100_neponset.c new file mode 100644 index 000000000000..5e34b3e8e5db --- /dev/null +++ b/drivers/pcmcia/sa1100_neponset.c @@ -0,0 +1,143 @@ +/* + * linux/drivers/pcmcia/sa1100_neponset.c + * + * Neponset PCMCIA specific routines + */ +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/sched.h> +#include <linux/device.h> +#include <linux/errno.h> +#include <linux/init.h> + +#include <asm/hardware.h> +#include <asm/mach-types.h> +#include <asm/arch/neponset.h> +#include <asm/hardware/sa1111.h> + +#include "sa1111_generic.h" + +/* + * Neponset uses the Maxim MAX1600, with the following connections: + * + * MAX1600 Neponset + * + * A0VCC SA-1111 GPIO A<1> + * A1VCC SA-1111 GPIO A<0> + * A0VPP CPLD NCR A0VPP + * A1VPP CPLD NCR A1VPP + * B0VCC SA-1111 GPIO A<2> + * B1VCC SA-1111 GPIO A<3> + * B0VPP ground (slot B is CF) + * B1VPP ground (slot B is CF) + * + * VX VCC (5V) + * VY VCC3_3 (3.3V) + * 12INA 12V + * 12INB ground (slot B is CF) + * + * The MAX1600 CODE pin is tied to ground, placing the device in + * "Standard Intel code" mode. Refer to the Maxim data sheet for + * the corresponding truth table. + */ + +static int +neponset_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state) +{ + unsigned int ncr_mask, ncr_set, pa_dwr_mask, pa_dwr_set; + int ret; + + switch (skt->nr) { + case 0: + pa_dwr_mask = GPIO_A0 | GPIO_A1; + ncr_mask = NCR_A0VPP | NCR_A1VPP; + + if (state->Vpp == 0) + ncr_set = 0; + else if (state->Vpp == 120) + ncr_set = NCR_A1VPP; + else if (state->Vpp == state->Vcc) + ncr_set = NCR_A0VPP; + else { + printk(KERN_ERR "%s(): unrecognized VPP %u\n", + __FUNCTION__, state->Vpp); + return -1; + } + break; + + case 1: + pa_dwr_mask = GPIO_A2 | GPIO_A3; + ncr_mask = 0; + ncr_set = 0; + + if (state->Vpp != state->Vcc && state->Vpp != 0) { + printk(KERN_ERR "%s(): CF slot cannot support VPP %u\n", + __FUNCTION__, state->Vpp); + return -1; + } + break; + + default: + return -1; + } + + /* + * pa_dwr_set is the mask for selecting Vcc on both sockets. + * pa_dwr_mask selects which bits (and therefore socket) we change. + */ + switch (state->Vcc) { + default: + case 0: pa_dwr_set = 0; break; + case 33: pa_dwr_set = GPIO_A1|GPIO_A2; break; + case 50: pa_dwr_set = GPIO_A0|GPIO_A3; break; + } + + ret = sa1111_pcmcia_configure_socket(skt, state); + if (ret == 0) { + unsigned long flags; + + local_irq_save(flags); + NCR_0 = (NCR_0 & ~ncr_mask) | ncr_set; + + local_irq_restore(flags); + sa1111_set_io(SA1111_DEV(skt->dev), pa_dwr_mask, pa_dwr_set); + } + + return 0; +} + +static void neponset_pcmcia_socket_init(struct soc_pcmcia_socket *skt) +{ + if (skt->nr == 0) + NCR_0 &= ~(NCR_A0VPP | NCR_A1VPP); + + sa1111_pcmcia_socket_init(skt); +} + +static struct pcmcia_low_level neponset_pcmcia_ops = { + .owner = THIS_MODULE, + .hw_init = sa1111_pcmcia_hw_init, + .hw_shutdown = sa1111_pcmcia_hw_shutdown, + .socket_state = sa1111_pcmcia_socket_state, + .configure_socket = neponset_pcmcia_configure_socket, + .socket_init = neponset_pcmcia_socket_init, + .socket_suspend = sa1111_pcmcia_socket_suspend, +}; + +int __init pcmcia_neponset_init(struct sa1111_dev *sadev) +{ + int ret = -ENODEV; + + if (machine_is_assabet()) { + /* + * Set GPIO_A<3:0> to be outputs for the MAX1600, + * and switch to standby mode. + */ + sa1111_set_io_dir(sadev, GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0, 0); + sa1111_set_io(sadev, GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0); + sa1111_set_sleep_io(sadev, GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0); + ret = sa11xx_drv_pcmcia_probe(&sadev->dev, &neponset_pcmcia_ops, 0, 2); + } + + return ret; +} |