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Revert "Revert "Revert "8250: add support for ASIX devices with a FIFO bug"""

Browse source 
This reverts commit eea11c5180.

Reason for revert: Build is broken without it,
we don't care about GKI ABI.

Change-Id: I3d7be0324682d01b14863438d8383df16679ef38
This commit is contained in:
Michael Bestas 2025-05-08 07:19:36 +03:00
commit 6544d65e83
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GPG key ID: CC95044519BE6669
4 changed files with 3 additions and 29 deletions
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1
drivers/tty/serial/8250/8250.h
View file

@ -87,7 +87,6 @@ struct serial8250_config {
#define UART_BUG_TXEN (1 << 1) /* UART has buggy TX IIR status */
#define UART_BUG_NOMSR (1 << 2) /* UART has buggy MSR status bits (Au1x00) */
#define UART_BUG_THRE (1 << 3) /* UART has buggy THRE reassertion */
#define UART_BUG_PARITY (1 << 4) /* UART mishandles parity if FIFO enabled */
#ifdef CONFIG_SERIAL_8250_SHARE_IRQ

19
drivers/tty/serial/8250/8250_pci.c
View file

@ -1070,14 +1070,6 @@ static int pci_oxsemi_tornado_init(struct pci_dev *dev)
return number_uarts;
}
static int pci_asix_setup(struct serial_private *priv,
const struct pciserial_board *board,
struct uart_8250_port *port, int idx)
{
port->bugs |= UART_BUG_PARITY;
return pci_default_setup(priv, board, port, idx);
}
/* Quatech devices have their own extra interface features */
struct quatech_feature {
@ -1874,7 +1866,6 @@ pci_moxa_setup(struct serial_private *priv,
#define PCI_DEVICE_ID_WCH_CH355_4S 0x7173
#define PCI_VENDOR_ID_AGESTAR 0x5372
#define PCI_DEVICE_ID_AGESTAR_9375 0x6872
#define PCI_VENDOR_ID_ASIX 0x9710
#define PCI_DEVICE_ID_BROADCOM_TRUMANAGE 0x160a
#define PCI_DEVICE_ID_AMCC_ADDIDATA_APCI7800 0x818e
@ -2673,16 +2664,6 @@ static struct pci_serial_quirk pci_serial_quirks[] __refdata = {
.subdevice = PCI_ANY_ID,
.setup = pci_wch_ch38x_setup,
},
/*
* ASIX devices with FIFO bug
*/
{
.vendor = PCI_VENDOR_ID_ASIX,
.device = PCI_ANY_ID,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
.setup = pci_asix_setup,
},
/*
* Broadcom TruManage (NetXtreme)
*/

11
drivers/tty/serial/8250/8250_port.c
View file

@ -2546,11 +2546,8 @@ static unsigned char serial8250_compute_lcr(struct uart_8250_port *up,
if (c_cflag & CSTOPB)
cval |= UART_LCR_STOP;
if (c_cflag & PARENB) {
if (c_cflag & PARENB)
cval |= UART_LCR_PARITY;
if (up->bugs & UART_BUG_PARITY)
up->fifo_bug = true;
}
if (!(c_cflag & PARODD))
cval |= UART_LCR_EPAR;
#ifdef CMSPAR
@ -2657,8 +2654,7 @@ serial8250_do_set_termios(struct uart_port *port, struct ktermios *termios,
up->lcr = cval; /* Save computed LCR */
if (up->capabilities & UART_CAP_FIFO && port->fifosize > 1) {
/* NOTE: If fifo_bug is not set, a user can set RX_trigger. */
if ((baud < 2400 && !up->dma) || up->fifo_bug) {
if (baud < 2400 && !up->dma) {
up->fcr &= ~UART_FCR_TRIGGER_MASK;
up->fcr |= UART_FCR_TRIGGER_1;
}
@ -2994,8 +2990,7 @@ static int do_set_rxtrig(struct tty_port *port, unsigned char bytes)
struct uart_8250_port *up = up_to_u8250p(uport);
int rxtrig;
if (!(up->capabilities & UART_CAP_FIFO) || uport->fifosize <= 1 ||
up->fifo_bug)
if (!(up->capabilities & UART_CAP_FIFO) || uport->fifosize <= 1)
return -EINVAL;
rxtrig = bytes_to_fcr_rxtrig(up, bytes);