Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
mmc: mmci: Add ARM variant with extended FIFO
New IO FPGA implementation for Versatile Express boards contain
MMCI (PL180) cell with FIFO extended to 128 words (512 bytes).
Matt Waddel reports that this patch improves MMC performance on
his vexpress system, and also fixes "mmcblk0: error -5 transferring
data" errors.
Signed-off-by: Pawel Moll <pawel.moll@arm.com>
Tested-by: Matt Waddel <matt.waddel@linaro.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
authored by Pawel Moll and committed by Chris Ball 768fbc18 a5289a43
+12
-1
drivers/mmc/host/mmci.c
+12
-1
drivers/mmc/host/mmci.c
···
68
68
.datalength_bits = 16,
69
69
};
70
70
71
+
static struct variant_data variant_arm_extended_fifo = {
72
+
.fifosize = 128 * 4,
73
+
.fifohalfsize = 64 * 4,
74
+
.datalength_bits = 16,
75
+
};
76
+
71
77
static struct variant_data variant_u300 = {
72
78
.fifosize = 16 * 4,
73
79
.fifohalfsize = 8 * 4,
···
1283
1277
static struct amba_id mmci_ids[] = {
1284
1278
{
1285
1279
.id = 0x00041180,
1286
-
.mask = 0x000fffff,
1280
+
.mask = 0xff0fffff,
1287
1281
.data = &variant_arm,
1282
+
},
1283
+
{
1284
+
.id = 0x01041180,
1285
+
.mask = 0xff0fffff,
1286
+
.data = &variant_arm_extended_fifo,
1288
1287
},
1289
1288
{
1290
1289
.id = 0x00041181,