diff options
Diffstat (limited to 'drivers/pcmcia/sa1111_badge4.c')
| -rw-r--r-- | drivers/pcmcia/sa1111_badge4.c | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/drivers/pcmcia/sa1111_badge4.c b/drivers/pcmcia/sa1111_badge4.c new file mode 100644 index 0000000..4d206f4 --- /dev/null +++ b/drivers/pcmcia/sa1111_badge4.c @@ -0,0 +1,166 @@ +/* + * linux/drivers/pcmcia/sa1100_badge4.c + * + * BadgePAD 4 PCMCIA specific routines + * + * Christopher Hoover <ch@hpl.hp.com> + * + * Copyright (C) 2002 Hewlett-Packard Company + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/device.h> +#include <linux/errno.h> +#include <linux/init.h> + +#include <mach/hardware.h> +#include <asm/mach-types.h> +#include <mach/badge4.h> +#include <asm/hardware/sa1111.h> + +#include "sa1111_generic.h" + +/* + * BadgePAD 4 Details + * + * PCM Vcc: + * + * PCM Vcc on BadgePAD 4 can be jumpered for 3v3 (short pins 1 and 3 + * on JP6) or 5v0 (short pins 3 and 5 on JP6). + * + * PCM Vpp: + * + * PCM Vpp on BadgePAD 4 can be jumpered for 12v0 (short pins 4 and 6 + * on JP6) or tied to PCM Vcc (short pins 2 and 4 on JP6). N.B., + * 12v0 operation requires that the power supply actually supply 12v0 + * via pin 7 of JP7. + * + * CF Vcc: + * + * CF Vcc on BadgePAD 4 can be jumpered either for 3v3 (short pins 1 + * and 2 on JP10) or 5v0 (short pins 2 and 3 on JP10). + * + * Unfortunately there's no way programmatically to determine how a + * given board is jumpered. This code assumes a default jumpering + * as described below. + * + * If the defaults aren't correct, you may override them with a pcmv + * setup argument: pcmv=<pcm vcc>,<pcm vpp>,<cf vcc>. The units are + * tenths of volts; e.g. pcmv=33,120,50 indicates 3v3 PCM Vcc, 12v0 + * PCM Vpp, and 5v0 CF Vcc. + * + */ + +static int badge4_pcmvcc = 50; /* pins 3 and 5 jumpered on JP6 */ +static int badge4_pcmvpp = 50; /* pins 2 and 4 jumpered on JP6 */ +static int badge4_cfvcc = 33; /* pins 1 and 2 jumpered on JP10 */ + +static void complain_about_jumpering(const char *whom, + const char *supply, + int given, int wanted) +{ + printk(KERN_ERR + "%s: %s %d.%dV wanted but board is jumpered for %s %d.%dV operation" + "; re-jumper the board and/or use pcmv=xx,xx,xx\n", + whom, supply, + wanted / 10, wanted % 10, + supply, + given / 10, given % 10); +} + +static int +badge4_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state) +{ + int ret; + + switch (skt->nr) { + case 0: + if ((state->Vcc != 0) && + (state->Vcc != badge4_pcmvcc)) { + complain_about_jumpering(__func__, "pcmvcc", + badge4_pcmvcc, state->Vcc); + // Apply power regardless of the jumpering. + // return -1; + } + if ((state->Vpp != 0) && + (state->Vpp != badge4_pcmvpp)) { + complain_about_jumpering(__func__, "pcmvpp", + badge4_pcmvpp, state->Vpp); + return -1; + } + break; + + case 1: + if ((state->Vcc != 0) && + (state->Vcc != badge4_cfvcc)) { + complain_about_jumpering(__func__, "cfvcc", + badge4_cfvcc, state->Vcc); + return -1; + } + break; + + default: + return -1; + } + + ret = sa1111_pcmcia_configure_socket(skt, state); + if (ret == 0) { + unsigned long flags; + int need5V; + + local_irq_save(flags); + + need5V = ((state->Vcc == 50) || (state->Vpp == 50)); + + badge4_set_5V(BADGE4_5V_PCMCIA_SOCK(skt->nr), need5V); + + local_irq_restore(flags); + } + + return ret; +} + +static struct pcmcia_low_level badge4_pcmcia_ops = { + .owner = THIS_MODULE, + .configure_socket = badge4_pcmcia_configure_socket, + .first = 0, + .nr = 2, +}; + +int pcmcia_badge4_init(struct device *dev) +{ + int ret = -ENODEV; + + if (machine_is_badge4()) { + printk(KERN_INFO + "%s: badge4_pcmvcc=%d, badge4_pcmvpp=%d, badge4_cfvcc=%d\n", + __func__, + badge4_pcmvcc, badge4_pcmvpp, badge4_cfvcc); + + sa11xx_drv_pcmcia_ops(&badge4_pcmcia_ops); + ret = sa1111_pcmcia_add(dev, &badge4_pcmcia_ops, + sa11xx_drv_pcmcia_add_one); + } + + return ret; +} + +static int __init pcmv_setup(char *s) +{ + int v[4]; + + s = get_options(s, ARRAY_SIZE(v), v); + + if (v[0] >= 1) badge4_pcmvcc = v[1]; + if (v[0] >= 2) badge4_pcmvpp = v[2]; + if (v[0] >= 3) badge4_cfvcc = v[3]; + + return 1; +} + +__setup("pcmv=", pcmv_setup); |
