Greg Kroah-Hartman | 83ddaaa | 2014-08-11 17:27:22 +0800 | [diff] [blame] | 1 | /* |
| 2 | * SD/MMC Greybus driver. |
| 3 | * |
| 4 | * Copyright 2014 Google Inc. |
| 5 | * |
| 6 | * Released under the GPLv2 only. |
| 7 | */ |
| 8 | |
| 9 | #include <linux/kernel.h> |
| 10 | #include <linux/module.h> |
| 11 | #include <linux/slab.h> |
| 12 | #include <linux/mmc/host.h> |
| 13 | #include "greybus.h" |
| 14 | |
Greg Kroah-Hartman | 199d68d | 2014-08-30 16:20:22 -0700 | [diff] [blame] | 15 | struct gb_sdio_host { |
Greg Kroah-Hartman | 83ddaaa | 2014-08-11 17:27:22 +0800 | [diff] [blame] | 16 | struct mmc_host *mmc; |
| 17 | struct mmc_request *mrq; |
| 18 | // FIXME - some lock? |
| 19 | }; |
| 20 | |
Greg Kroah-Hartman | 6584c8a | 2014-09-01 13:31:31 -0700 | [diff] [blame] | 21 | static const struct greybus_module_id id_table[] = { |
Greg Kroah-Hartman | 83ddaaa | 2014-08-11 17:27:22 +0800 | [diff] [blame] | 22 | { GREYBUS_DEVICE(0x43, 0x43) }, /* make shit up */ |
| 23 | { }, /* terminating NULL entry */ |
| 24 | }; |
| 25 | |
| 26 | static void gb_sd_request(struct mmc_host *mmc, struct mmc_request *mrq) |
| 27 | { |
| 28 | // FIXME - do something here... |
| 29 | } |
| 30 | |
| 31 | static void gb_sd_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) |
| 32 | { |
| 33 | // FIXME - do something here... |
| 34 | } |
| 35 | |
| 36 | static int gb_sd_get_ro(struct mmc_host *mmc) |
| 37 | { |
| 38 | // FIXME - do something here... |
| 39 | return 0; |
| 40 | } |
| 41 | |
| 42 | static const struct mmc_host_ops gb_sd_ops = { |
| 43 | .request = gb_sd_request, |
| 44 | .set_ios = gb_sd_set_ios, |
| 45 | .get_ro = gb_sd_get_ro, |
| 46 | }; |
| 47 | |
Alex Elder | 778c69c | 2014-09-22 19:19:03 -0500 | [diff] [blame] | 48 | int gb_sdio_probe(struct greybus_module *gmod, |
Greg Kroah-Hartman | 6584c8a | 2014-09-01 13:31:31 -0700 | [diff] [blame] | 49 | const struct greybus_module_id *id) |
Greg Kroah-Hartman | 83ddaaa | 2014-08-11 17:27:22 +0800 | [diff] [blame] | 50 | { |
| 51 | struct mmc_host *mmc; |
Greg Kroah-Hartman | 199d68d | 2014-08-30 16:20:22 -0700 | [diff] [blame] | 52 | struct gb_sdio_host *host; |
Greg Kroah-Hartman | 83ddaaa | 2014-08-11 17:27:22 +0800 | [diff] [blame] | 53 | |
Alex Elder | 778c69c | 2014-09-22 19:19:03 -0500 | [diff] [blame] | 54 | mmc = mmc_alloc_host(sizeof(struct gb_sdio_host), &gmod->dev); |
Greg Kroah-Hartman | 83ddaaa | 2014-08-11 17:27:22 +0800 | [diff] [blame] | 55 | if (!mmc) |
| 56 | return -ENOMEM; |
| 57 | |
| 58 | host = mmc_priv(mmc); |
| 59 | host->mmc = mmc; |
| 60 | |
| 61 | mmc->ops = &gb_sd_ops; |
| 62 | // FIXME - set up size limits we can handle. |
| 63 | |
Alex Elder | 778c69c | 2014-09-22 19:19:03 -0500 | [diff] [blame] | 64 | gmod->gb_sdio_host = host; |
Greg Kroah-Hartman | 83ddaaa | 2014-08-11 17:27:22 +0800 | [diff] [blame] | 65 | return 0; |
| 66 | } |
| 67 | |
Alex Elder | 778c69c | 2014-09-22 19:19:03 -0500 | [diff] [blame] | 68 | void gb_sdio_disconnect(struct greybus_module *gmod) |
Greg Kroah-Hartman | 83ddaaa | 2014-08-11 17:27:22 +0800 | [diff] [blame] | 69 | { |
| 70 | struct mmc_host *mmc; |
Greg Kroah-Hartman | 199d68d | 2014-08-30 16:20:22 -0700 | [diff] [blame] | 71 | struct gb_sdio_host *host; |
Greg Kroah-Hartman | 83ddaaa | 2014-08-11 17:27:22 +0800 | [diff] [blame] | 72 | |
Alex Elder | 778c69c | 2014-09-22 19:19:03 -0500 | [diff] [blame] | 73 | host = gmod->gb_sdio_host; |
Greg Kroah-Hartman | 83ddaaa | 2014-08-11 17:27:22 +0800 | [diff] [blame] | 74 | mmc = host->mmc; |
| 75 | |
| 76 | mmc_remove_host(mmc); |
| 77 | mmc_free_host(mmc); |
| 78 | } |
| 79 | |
Greg Kroah-Hartman | db6e1fd | 2014-08-30 16:47:26 -0700 | [diff] [blame] | 80 | #if 0 |
Greg Kroah-Hartman | 83ddaaa | 2014-08-11 17:27:22 +0800 | [diff] [blame] | 81 | static struct greybus_driver sd_gb_driver = { |
Greg Kroah-Hartman | db6e1fd | 2014-08-30 16:47:26 -0700 | [diff] [blame] | 82 | .probe = gb_sdio_probe, |
| 83 | .disconnect = gb_sdio_disconnect, |
Greg Kroah-Hartman | 83ddaaa | 2014-08-11 17:27:22 +0800 | [diff] [blame] | 84 | .id_table = id_table, |
| 85 | }; |
| 86 | |
| 87 | module_greybus_driver(sd_gb_driver); |
| 88 | MODULE_LICENSE("GPL"); |
| 89 | MODULE_DESCRIPTION("Greybus SD/MMC Host driver"); |
| 90 | MODULE_AUTHOR("Greg Kroah-Hartman <gregkh@linuxfoundation.org>"); |
Greg Kroah-Hartman | db6e1fd | 2014-08-30 16:47:26 -0700 | [diff] [blame] | 91 | #endif |