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usb: isp1760: fix strict typechecking

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There are a lot of pre-existing typechecking warnings around the
access and assign of elements of ptd structure of __dw type.

sparse: warning: invalid assignment: |=
sparse:    left side has type restricted __dw
sparse:    right side has type unsigned int

or

warning: restricted __dw degrades to integer

or

sparse: warning: incorrect type in assignment (different base types)
sparse:    expected restricted __dw [usertype] dw4
sparse:    got unsigned int [assigned] [usertype] usof

To handle this, annotate conversions along the {TO,FROM}_DW* macros
and some assignments and function arguments.

This clean up completely all sparse warnings for this driver.

Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
Link: https://lore.kernel.org/r/20210513084717.2487366-2-rui.silva@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Rui Miguel Silva 2021-05-13 09:47:09 +01:00 committed by Greg Kroah-Hartman
parent 24bb0076d7
commit abfabc8ae3
1 changed files with 46 additions and 44 deletions
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90
drivers/usb/isp1760/isp1760-hcd.c
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@ -66,44 +66,46 @@ struct ptd {
#define ATL_PTD_OFFSET 0x0c00
#define PAYLOAD_OFFSET 0x1000
#define TO_DW(x) ((__force __dw)x)
#define TO_U32(x) ((__force u32)x)
/* ATL */
/* DW0 */
#define DW0_VALID_BIT 1
#define FROM_DW0_VALID(x) ((x) & 0x01)
#define TO_DW0_LENGTH(x) (((u32) x) << 3)
#define TO_DW0_MAXPACKET(x) (((u32) x) << 18)
#define TO_DW0_MULTI(x) (((u32) x) << 29)
#define TO_DW0_ENDPOINT(x) (((u32) x) << 31)
/* ATL */
/* DW0 */
#define DW0_VALID_BIT TO_DW(1)
#define FROM_DW0_VALID(x) (TO_U32(x) & 0x01)
#define TO_DW0_LENGTH(x) TO_DW((((u32)x) << 3))
#define TO_DW0_MAXPACKET(x) TO_DW((((u32)x) << 18))
#define TO_DW0_MULTI(x) TO_DW((((u32)x) << 29))
#define TO_DW0_ENDPOINT(x) TO_DW((((u32)x) << 31))
/* DW1 */
#define TO_DW1_DEVICE_ADDR(x) (((u32) x) << 3)
#define TO_DW1_PID_TOKEN(x) (((u32) x) << 10)
#define DW1_TRANS_BULK ((u32) 2 << 12)
#define DW1_TRANS_INT ((u32) 3 << 12)
#define DW1_TRANS_SPLIT ((u32) 1 << 14)
#define DW1_SE_USB_LOSPEED ((u32) 2 << 16)
#define TO_DW1_PORT_NUM(x) (((u32) x) << 18)
#define TO_DW1_HUB_NUM(x) (((u32) x) << 25)
#define TO_DW1_DEVICE_ADDR(x) TO_DW((((u32)x) << 3))
#define TO_DW1_PID_TOKEN(x) TO_DW((((u32)x) << 10))
#define DW1_TRANS_BULK TO_DW(((u32)2 << 12))
#define DW1_TRANS_INT TO_DW(((u32)3 << 12))
#define DW1_TRANS_SPLIT TO_DW(((u32)1 << 14))
#define DW1_SE_USB_LOSPEED TO_DW(((u32)2 << 16))
#define TO_DW1_PORT_NUM(x) TO_DW((((u32)x) << 18))
#define TO_DW1_HUB_NUM(x) TO_DW((((u32)x) << 25))
/* DW2 */
#define TO_DW2_DATA_START_ADDR(x) (((u32) x) << 8)
#define TO_DW2_RL(x) ((x) << 25)
#define FROM_DW2_RL(x) (((x) >> 25) & 0xf)
#define TO_DW2_DATA_START_ADDR(x) TO_DW((((u32)x) << 8))
#define TO_DW2_RL(x) TO_DW(((x) << 25))
#define FROM_DW2_RL(x) ((TO_U32(x) >> 25) & 0xf)
/* DW3 */
#define FROM_DW3_NRBYTESTRANSFERRED(x) ((x) & 0x7fff)
#define FROM_DW3_SCS_NRBYTESTRANSFERRED(x) ((x) & 0x07ff)
#define TO_DW3_NAKCOUNT(x) ((x) << 19)
#define FROM_DW3_NAKCOUNT(x) (((x) >> 19) & 0xf)
#define TO_DW3_CERR(x) ((x) << 23)
#define FROM_DW3_CERR(x) (((x) >> 23) & 0x3)
#define TO_DW3_DATA_TOGGLE(x) ((x) << 25)
#define FROM_DW3_DATA_TOGGLE(x) (((x) >> 25) & 0x1)
#define TO_DW3_PING(x) ((x) << 26)
#define FROM_DW3_PING(x) (((x) >> 26) & 0x1)
#define DW3_ERROR_BIT (1 << 28)
#define DW3_BABBLE_BIT (1 << 29)
#define DW3_HALT_BIT (1 << 30)
#define DW3_ACTIVE_BIT (1 << 31)
#define FROM_DW3_ACTIVE(x) (((x) >> 31) & 0x01)
#define FROM_DW3_NRBYTESTRANSFERRED(x) TO_U32((x) & 0x7fff)
#define FROM_DW3_SCS_NRBYTESTRANSFERRED(x) TO_U32((x) & 0x07ff)
#define TO_DW3_NAKCOUNT(x) TO_DW(((x) << 19))
#define FROM_DW3_NAKCOUNT(x) ((TO_U32(x) >> 19) & 0xf)
#define TO_DW3_CERR(x) TO_DW(((x) << 23))
#define FROM_DW3_CERR(x) ((TO_U32(x) >> 23) & 0x3)
#define TO_DW3_DATA_TOGGLE(x) TO_DW(((x) << 25))
#define FROM_DW3_DATA_TOGGLE(x) ((TO_U32(x) >> 25) & 0x1)
#define TO_DW3_PING(x) TO_DW(((x) << 26))
#define FROM_DW3_PING(x) ((TO_U32(x) >> 26) & 0x1)
#define DW3_ERROR_BIT TO_DW((1 << 28))
#define DW3_BABBLE_BIT TO_DW((1 << 29))
#define DW3_HALT_BIT TO_DW((1 << 30))
#define DW3_ACTIVE_BIT TO_DW((1 << 31))
#define FROM_DW3_ACTIVE(x) ((TO_U32(x) >> 31) & 0x01)
#define INT_UNDERRUN (1 << 2)
#define INT_BABBLE (1 << 1)
@ -292,12 +294,12 @@ static void ptd_write(void __iomem *base, u32 ptd_offset, u32 slot,
struct ptd *ptd)
{
mem_writes8(base, ptd_offset + slot*sizeof(*ptd) + sizeof(ptd->dw0),
&ptd->dw1, 7*sizeof(ptd->dw1));
(__force u32 *)&ptd->dw1, 7 * sizeof(ptd->dw1));
/* Make sure dw0 gets written last (after other dw's and after payload)
since it contains the enable bit */
wmb();
mem_writes8(base, ptd_offset + slot*sizeof(*ptd), &ptd->dw0,
sizeof(ptd->dw0));
mem_writes8(base, ptd_offset + slot * sizeof(*ptd),
(__force u32 *)&ptd->dw0, sizeof(ptd->dw0));
}
@ -553,7 +555,7 @@ static void create_ptd_atl(struct isp1760_qh *qh,
ptd->dw0 |= TO_DW0_ENDPOINT(usb_pipeendpoint(qtd->urb->pipe));
/* DW1 */
ptd->dw1 = usb_pipeendpoint(qtd->urb->pipe) >> 1;
ptd->dw1 = TO_DW((usb_pipeendpoint(qtd->urb->pipe) >> 1));
ptd->dw1 |= TO_DW1_DEVICE_ADDR(usb_pipedevice(qtd->urb->pipe));
ptd->dw1 |= TO_DW1_PID_TOKEN(qtd->packet_type);
@ -575,7 +577,7 @@ static void create_ptd_atl(struct isp1760_qh *qh,
/* SE bit for Split INT transfers */
if (usb_pipeint(qtd->urb->pipe) &&
(qtd->urb->dev->speed == USB_SPEED_LOW))
ptd->dw1 |= 2 << 16;
ptd->dw1 |= DW1_SE_USB_LOSPEED;
rl = 0;
nak = 0;
@ -647,14 +649,14 @@ static void transform_add_int(struct isp1760_qh *qh,
* that number come from? 0xff seems to work fine...
*/
/* ptd->dw5 = 0x1c; */
ptd->dw5 = 0xff; /* Execute Complete Split on any uFrame */
ptd->dw5 = TO_DW(0xff); /* Execute Complete Split on any uFrame */
}
period = period >> 1;/* Ensure equal or shorter period than requested */
period &= 0xf8; /* Mask off too large values and lowest unused 3 bits */
ptd->dw2 |= period;
ptd->dw4 = usof;
ptd->dw2 |= TO_DW(period);
ptd->dw4 = TO_DW(usof);
}
static void create_ptd_int(struct isp1760_qh *qh,
@ -977,10 +979,10 @@ static void schedule_ptds(struct usb_hcd *hcd)
static int check_int_transfer(struct usb_hcd *hcd, struct ptd *ptd,
struct urb *urb)
{
__dw dw4;
u32 dw4;
int i;
dw4 = ptd->dw4;
dw4 = TO_U32(ptd->dw4);
dw4 >>= 8;
/* FIXME: ISP1761 datasheet does not say what to do with these. Do we