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| author | Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> | 2013-01-25 16:17:38 +0100 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2013-01-25 19:52:14 +0100 |
| commit | b9696a0b3f6c1e330314f97e174eb62793ce0a38 (patch) | |
| tree | 2db4c46ace8d61b6bdec6f9f17a7ef349b9894d0 /drivers/mci/atmel_mci.c | |
| parent | f674fb3125caa95da14ac8d6c42c1c5957bc22ba (diff) | |
| download | barebox-b9696a0b3f6c1e330314f97e174eb62793ce0a38.tar.gz barebox-b9696a0b3f6c1e330314f97e174eb62793ce0a38.tar.xz | |
atmel_mci: detect IP version
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'drivers/mci/atmel_mci.c')
| -rw-r--r-- | drivers/mci/atmel_mci.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/drivers/mci/atmel_mci.c b/drivers/mci/atmel_mci.c index 21c314cae6..b9b0668721 100644 --- a/drivers/mci/atmel_mci.c +++ b/drivers/mci/atmel_mci.c @@ -37,6 +37,7 @@ struct atmel_mci { struct mci_cmd *cmd; struct mci_data *data; unsigned slot_b; + int version; }; #define to_mci_host(mci) container_of(mci, struct atmel_mci, mci) @@ -426,6 +427,34 @@ static void atmci_info(struct device_d *mci_dev) } #endif /* CONFIG_MCI_INFO */ +/* + * HSMCI (High Speed MCI) module is not fully compatible with MCI module. + * HSMCI provides DMA support and a new config register but no more supports + * PDC. + */ +static void atmci_get_cap(struct atmel_mci *host) +{ + unsigned int version; + + version = atmci_readl(host, ATMCI_VERSION) & 0x00000fff; + host->version = version; + + dev_info(host->hw_dev, "version: 0x%x\n", version); + + switch (version & 0xf00) { + case 0x500: + case 0x400: + case 0x300: + case 0x200: + case 0x100: + case 0x0: + break; + default: + dev_warn(host->hw_dev, + "Unmanaged mci version, set minimum capabilities\n"); + break; + } +} static int atmci_probe(struct device_d *hw_dev) { @@ -438,6 +467,7 @@ static int atmci_probe(struct device_d *hw_dev) return -EINVAL; } + host = xzalloc(sizeof(*host)); host->mci.send_cmd = atmci_request; host->mci.set_ios = atmci_set_ios; @@ -467,6 +497,8 @@ static int atmci_probe(struct device_d *hw_dev) host->mci.f_min = clk_rate >> 9; host->mci.f_max = clk_rate >> 1; + atmci_get_cap(host); + mci_register(&host->mci); return 0; |