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[Qemu-devel] [PATCH v2 04/14] sdcard: Extract sd_frame48/136_calc_checks
From: |
Philippe Mathieu-Daudé |
Subject: |
[Qemu-devel] [PATCH v2 04/14] sdcard: Extract sd_frame48/136_calc_checksum() |
Date: |
Wed, 9 May 2018 00:46:48 -0300 |
It will help when moving this around for qtesting in the next commit.
Signed-off-by: Philippe Mathieu-Daudé <address@hidden>
---
hw/sd/sd.c | 21 ++++++++++++++++++---
1 file changed, 18 insertions(+), 3 deletions(-)
diff --git a/hw/sd/sd.c b/hw/sd/sd.c
index 27a70896cd..06607115a7 100644
--- a/hw/sd/sd.c
+++ b/hw/sd/sd.c
@@ -273,6 +273,21 @@ static uint16_t sd_crc16(const void *message, size_t width)
return shift_reg;
}
+enum {
+ F48_CONTENT_LENGTH = 1 /* command */ + 4 /* argument */,
+ F136_CONTENT_LENGTH = 15,
+};
+
+static uint8_t sd_frame48_calc_checksum(const void *content)
+{
+ return sd_crc7(content, F48_CONTENT_LENGTH);
+}
+
+static uint8_t sd_frame136_calc_checksum(const void *content)
+{
+ return (sd_crc7(content, F136_CONTENT_LENGTH) << 1) | 1;
+}
+
#define OCR_POWER_DELAY_NS 500000 /* 0.5ms */
FIELD(OCR, VDD_VOLTAGE_WINDOW, 0, 24)
@@ -352,7 +367,7 @@ static void sd_set_cid(SDState *sd)
sd->cid[13] = 0x00 | /* Manufacture date (MDT) */
((MDT_YR - 2000) / 10);
sd->cid[14] = ((MDT_YR % 10) << 4) | MDT_MON;
- sd->cid[15] = (sd_crc7(sd->cid, 15) << 1) | 1;
+ sd->cid[15] = sd_frame136_calc_checksum(sd->cid);
}
#define HWBLOCK_SHIFT 9 /* 512 bytes */
@@ -416,7 +431,7 @@ static void sd_set_csd(SDState *sd, uint64_t size)
sd->csd[13] = 0x40;
sd->csd[14] = 0x00;
}
- sd->csd[15] = (sd_crc7(sd->csd, 15) << 1) | 1;
+ sd->csd[15] = sd_frame136_calc_checksum(sd->csd);
}
static void sd_set_rca(SDState *sd)
@@ -491,7 +506,7 @@ static int sd_req_crc_validate(SDRequest *req)
buffer[0] = 0x40 | req->cmd;
stl_be_p(&buffer[1], req->arg);
return 0;
- return sd_crc7(buffer, 5) != req->crc; /* TODO */
+ return sd_frame48_calc_checksum(buffer) != req->crc; /* TODO */
}
static void sd_response_r1_make(SDState *sd, uint8_t *response)
--
2.17.0
[Qemu-devel] [PATCH v2 05/14] sdcard: Move sd_crc7() and calc_checksum() out for qtesting, Philippe Mathieu-Daudé, 2018/05/08
[Qemu-devel] [PATCH v2 06/14] sdcard: Add test_sd_verify_cksum_frame136(), Philippe Mathieu-Daudé, 2018/05/08
[Qemu-devel] [PATCH v2 07/14] sdcard: Invert the sd_req_crc_is_valid() logic, Philippe Mathieu-Daudé, 2018/05/08
[Qemu-devel] [PATCH v2 08/14] sdcard: Extract sd_frame48_verify_checksum() out for qtesting, Philippe Mathieu-Daudé, 2018/05/08